Fait mathématique: 55711 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Culture générale: 55711 is an unremarkable number.
Date historique: July 12th is the day in 1970 that a fire consumes the wooden home of Norwegian composer Geirr Tveitt and irretrievably destroys about 90 percent of his output.