Fait général: 7680 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 7680 is the number of possible rook moves on a 16×16 chessboard.
Culture générale: 7680 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: January 9th is the day in 1894 that New England Telephone and Telegraph installs the first battery-operated telephone switchboard in Lexington, Massachusetts.