Here is wisdom. Let him that hath understanding count the number of the beast: for it is the number of a man; and his number is Six hundred threescore.
Association with the devil, the beast is the Antichrist. In the bible is says that there will be many Antichrist before him, You may have heard of them.
Nero, Hitler and others. They are men who want to unite Europe. Europe at the moment is divided and the bible says that Europe shall forever be divided and that will remain unchanged.