'Man's' in the Bible

And the first living creature [was] similar to a lion, and the second living creature [was] similar to an ox, and the third living creature had a face like a man's, and the fourth living creature [was] similar to an eagle flying.

Here is wisdom: the one who has understanding, let him calculate the number of the beast, for it is man's number, and his number [is] six hundred sixty-six.