GOD'S WORD® Translation
In this situation wisdom is needed. Let the person who has insight figure out the number of the beast, because it is a human number. The beast's number is 666.

American Standard Version
Here is wisdom. He that hath understanding, let him count the number of the beast; for it is the number of a man: and his number is Six hundred and sixty and six.

Berean Study Bible
Here is a call for wisdom: Let the one who has insight calculate the number of the beast, for it is the number of a man, and that number is 666.

Douay-Rheims Bible
Here is wisdom. He that hath understanding, let him count the number of the beast. For it is the number of a man: and the number of him is six hundred sixty-six.

English Revised Version
Here is wisdom. He that hath understanding, let him count the number of the beast; for it is the number of a man: and his number is Six hundred and sixty and six.

King James Bible
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.

World English Bible
Here is wisdom. He who has understanding, let him calculate the number of the beast, for it is the number of a man. His number is six hundred sixty-six.

Young's Literal Translation
Here is the wisdom! He who is having the understanding, let him count the number of the beast, for the number of a man it is, and its number is six hundred and sixty six.

Revelation 13:18 Additional Translations ...