Fatto generale: 16977 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 16977 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 16977 is a boring number.
Data storica: June 24th is the day in 1717 that the Premier Grand Lodge of England, the first Masonic Grand Lodge in the world (now the United Grand Lodge of England), is founded in London, England.