Mathematical fact: 1775 is a member of the Fibonacci-type sequence starting with 1 and 7.
Trivia: 1775 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Historical date: November 9th is the day in 1998 that a US federal judge ordered 37 US brokerage houses to pay 1.03 billion USD to cheated NASDAQ investors to compensate for price-fixing.