Parallel
Revelation 13:18
Patriarchal Greek New Testament (1904) · Berean Standard Bible
Ὧδε ἡ σοφία ἐστίν· ὁ ἔχων νοῦν ψηφισάτω τὸν ἀριθμὸν τοῦ θηρίου· ἀριθμὸς γὰρ ἀνθρώπου ἐστί· καὶ ὁ ἀριθμὸς αὐτοῦ χξς΄.
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.