66 or 49(7x)
Hellenistic-66 or Godly 49(7*7)
Originally in the ancient times before the modern Bibles, the Old Testament count was 22 books.
and 27 New Testament.
Making the Book count 49 = 7 * 7
Jerome’s Twenty Two Books: The Alphabet of the Doctrine of God - Ancient Hebrew Poetry (typepad.com)