Fatto generale: 7686 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 7686 is a value of n for which 7n and 9n together use each digit exactly once.
Trivia: 7686 is an uninteresting number.
Data storica: January 15th is the day in 1991 that the United Nations deadline for the withdrawal of Iraqi forces from occupied Kuwait expires, preparing the way for the start of Operation Desert Storm.