Fatto generale: 66963 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 66963 is an unremarkable number.
Trivia: 66963 is an unremarkable number.
Data storica: May 3rd is the day in 1963 that the police force in Birmingham, Alabama switches tactics and responds with violent force to stop the "Birmingham campaign" protesters.