Fait mathématique: 6040 is the number of ways to divide 6 couples into pairs where no pair is a couple.
Culture générale: 6040 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: July 14th is the day in 1791 that the Priestley Riots drive Joseph Priestley, a supporter of the French Revolution, out of Birmingham, England.