“Here is wisdom. Let him who has understanding calculate the number of the beast, for it is the number of a man: His number is 666.”Revelation 13:18
666 comes from Revelation 13 in the Bible. 666 is a human number that is connected with the mark of the beast. The beast is Satan in a brilliant, perfect body. He will appear to people as a glorious being and he claims to be God. He will have many names, all of which are different names for God. In fact, he will have a total of six hundred and sixty-six (666) names.
The verse tells us to calculate or count the number of names the beast has. The beast will have 666 names. When he first comes to earth he starts out with 7 blasphemous names and over the next few months he keeps adding names until he reaches 666 blasphemous names. These are blasphemous names because they claim to be God but they aren’t God. When you count up all of his names there will be 666 names. The mark of the beast is the name of the beast or any of his 666 names. In other words, you receive the mark of the beast by taking any one of the beast’s 666 names.
So why does he need so many names? Because he wants to appeal to every person on earth. He carefully select his blasphemous names so that one of his names will appeal to each person on earth. He will come as Allah or Imam Mahdi to the Muslims, Maitreya Buddha to the Buddhists, Jesus Christ to the Christians, Krishna to the Hindus, Messiah to the Jews, Saoshyant to the Zoroastrians, the “Dark Lord” to satanists, and so on through the whole list of 666 names. His goal is to win the worship and allegiance of every person on earth.