Fatto generale: 86656 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 86656 is an unremarkable number.
Trivia: 86656 is an unremarkable number.
Data storica: April 3rd is the day in 1975 that Bobby Fischer refuses to play in a chess match against Anatoly Karpov, giving Karpov the title of World Champion by default.