Fatto generale: 66413 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 66413 is an unremarkable number.
Trivia: 66413 is a boring number.
Data storica: October 30th is the day in 1938 that Orson Welles broadcasts his radio play of H. G. Wells's The War of the Worlds, causing anxiety in some of the audience in the United States.