1: ἕξ
(Strong's #1803 — Noun — hex — hex )

whence Eng. prefix, hex---, is used separately from other numerals in Matthew 17:1; Mark 9:2; Luke 4:25; 13:14; John 2:6; 12:1; Acts 11:12; 18:11; James 5:17; Revelation 4:8 . It sometimes suggests incompleteness, in comparison with the perfect number seven.

John 2:20Acts 27:37Revelation 13:18 SIXTY