Fatto generale: 27581 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 27581 is an unremarkable number.
Trivia: 27581 is a boring number.
Data storica: July 6th is the day in 1919 that the British dirigible R34 lands in New York, completing the first crossing of the Atlantic Ocean by an airship.