Fait mathématique: 86777 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Culture générale: 86777 is a boring number.
Date historique: August 2nd is the day in 1869 that Japan's samurai, farmer, artisan, merchant class system (Shinōkōshō) is abolished as part of the Meiji Restoration reforms.