Fait général: 6559 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 6559 is an unremarkable number.
Culture générale: 6559 is a boring number.
Date historique: December 15th is the day in 533 that Byzantine general Belisarius defeats the Vandals, commanded by King Gelimer, at the Battle of Ticameron.