Fatto matematico: 684 is the sum of 3 consecutive cubes.
Trivia: 684 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: November 14th is the day in 1984 that Zamboanga City mayor Cesar Climaco, a prominent critic of the government of Philippine President Ferdinand Marcos, is assassinated in his home city.