χξϛ
chx stigmaGreek · G5516
Derivation
the 22nd, 14th and an obsolete letter (G4742 (στίγμα) as a cross) of the Greek alphabet (intermediate between the 5th and 6th), used as numbers; denoting respectively 600, 60 and 6;
Meaning
666 as a numeral
In the King James Version
six hundred threescore and six