Fatto generale: 4566 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 4566 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 4566 is a boring number.
Data storica: July 1st is the day in 1967 that Canada celebrates the 100th anniversary of the British North America Act, 1867, which officially made Canada its own federal dominion.