Fatto matematico: 6594 is a value of n for which 5n and 7n together use each digit exactly once.
Trivia: 6594 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: January 19th is the day in 1997 that Yasser Arafat returns to Hebron after more than 30 years and joins celebrations over the handover of the last Israeli-controlled West Bank city.