Fait général: 6511 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 6511 is a number n whose sum of the factorials of its digits is equal to p(n).
Culture générale: 6511 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: October 28th is the day in 2009 that NASA successfully launches the Ares I-X mission, the only rocket launch for its later-cancelled Constellation program.