King James Version
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 and six.English Standard Version
This calls for wisdom: let the one who has understanding calculate the number of the beast, for it is the number of a man, and his number is 666.Catholic Public Domain Version
Here is wisdom. Whoever has intelligence, let him determine the number of the beast. For it is the number of a man, and his number is six hundred and sixty-six