Revelation 12:7 And there was war in heaven: Michael and his angels fought against the dragon; and the dragon fought and his angels, 8 And prevailed not; neither was their place found any more in heaven. 9 And the great dragon was cast out, that old serpent, called the Devil, and Satan, which deceiveth the whole world: he was cast out into the earth, and his angels were cast out with him.

Here, we saw that Michael has angels -- He is apparently in charge of the holy angels, just as the dragon(satan{vs 9}) is in charge of his evil angels.

2 Thessalonians1:7 And to you who are troubled rest with us, when the Lord Jesus shall be revealed from heaven with his mighty angels,

Matthew 13:41 The Son of man shall send forth his angels, and they shall gather out of his kingdom all things that offend, and them which do iniquity;

Matthew 16:27 For the Son of man shall come in the glory of his Father with his angels; and then he shall reward every man according to his works.

Matthew 24:30-31 And then shall appear the sign of the Son of man in heaven: and then shall all the tribes of the earth mourn, and they shall see the Son of man coming in the clouds of heaven with power and great glory. And he shall send his angels with a great sound of a trumpet, and they shall gather together his elect from the four winds, from one end of heaven to the other.

1 Peter 3:22 [Christ]Who is gone into heaven, and is on the right hand of God; angels and authorities and powers being made subject unto him.

From the above Bible texts, we see that Jesus("the Son of man") is in charge of the angels -- they are His angels. So, it seems likely that Jesus is Michael since he is also said to be in charge of the angels.

Consider also the next three texts which witness to Jesus being Michael the archangel:

1 Thessalonians 4:16 For the Lord himself shall descend from heaven with a shout, with the voice of the archangel...

According to Paul, who is "the Lord"? => 1 Corinthians 8:6 "But to us there is but... one Lord Jesus Christ...." 

Jude 1:9 Yet Michael the archangel, when contending with the devil he disputed about the body of Moses, durst not bring against him a railing accusation, but said, The Lord rebuke thee.

The Greek word translated "archangel" in both of the above texts is defined by Strong's Concordance thus:

G743. ἀρχάγγελος archaggelos, ar-khang´-el-os; a chief angel:— archangel.

This definition is consistent with Jesus being in charge of the angels, as we saw above (2 Thessalonians 1:7; Matthew 13:41; 16:27; 24:30)

Does the idea of Christ being a type of angel indicate that Christ was a created being? No. Strong's Concordance defines the Greek word translated to the English word "angel" thus:

G32. ἄγγελος aggelos, ang´-el-os; a messenger; especially an “angel”; by implication, a pastor:— angel, messenger.

So, according to the Greek, "angel", basically means messenger. Let's also look at Webster's 1828 dictionary:

As we can see, the word "angel" can have many applications. Notice #4: At that time it was generally understood that the angel of Rev 10:1 was Christ and I would agree. Also notice #5 where Webster refers to Rev. 2 & 3. Here the word "angel" appears to often refer to each of the leaders of the the 7 churches as an angel.

But, my main point here is that the word angel has a much broader meaning than just the created "ministering spirits" mentioned in Hebrews 1:7,14

So, could it be that Michael, the archangel, may not be created? The word “archangel” seems to be a title that indicates rule or authority over other angels. Michael appears to lead God’s angelic army in Revelation 12:7-8. Combine this with 2 Thessalonians 1:7; Matthew 13:41; 16:27; 24:30 where we saw Jesus being in charge of the holy angels and it is easy to conclude that Jesus Christ is the archangel who rules over God's angelic army.

Daniel 10:13,21 But the prince of the kingdom of Persia withstood me one and twenty days; but, lo, Michael, one of the chief princes, came to help me: and I remained there with the kings of Persia.... But I will tell thee that which is inscribed in the writing of truth: and there is none that holdeth with me against these, but Michael your prince.

• Acts 3:15 And killed the Prince of life, whom God hath raised from the dead; whereof we are witnesses.

• Acts 5:31 Him hath God exalted with his right hand to be a Prince and a Saviour, for to give repentance to Israel, and forgiveness of sins.

“At that time shall Michael stand up, the great Prince which standeth for the children of thy people: and there shall be a time of trouble, such as never was since there was a nation even to that same time: and at that time thy people shall be delivered, everyone that shall be found written in the book.” Daniel 12:1. GC 613.1

When the third angel's message closes, mercy no longer pleads for the guilty inhabitants of the earth. The people of God have accomplished their work. They have received “the latter rain,” “the refreshing from the presence of the Lord,”[Acts 3:19] and they are prepared for the trying hour before them. Angels are hastening to and fro in heaven. An angel returning from the earth announces that his work is done; the final test has been brought upon the world, and all who have proved themselves loyal to the divine precepts have received “the seal of the living God.”[Rev 7:2] Then Jesus ceases His intercession in the sanctuary above. He lifts His hands and with a loud voice says, “It is done;”[Rev 16:17] and all the angelic host lay off their crowns as He makes the solemn announcement: “He that is unjust, let him be unjust still: and he which is filthy, let him be filthy still: and he that is righteous, let him be righteous still: and he that is holy, let him be holy still.” Revelation 22:11. Every case has been decided for life or death. Christ has made the atonement for His people and blotted out their sins. The number of His subjects is made up; “the kingdom and dominion, and the greatness of the kingdom under the whole heaven,”[Dan 7:27] is about to be given to the heirs of salvation, and Jesus is to reign as King of kings and Lord of lords.[Rev 19:16] GC 613.2