Fait mathématique: 6523 is a value of n for which n, 2n, 3n, and 4n all use the same number of digits in Roman numerals.
Culture générale: 6523 is an uninteresting number.
Date historique: November 9th is the day in 1764 that Mary Campbell, a captive of the Lenape during the French and Indian War, is turned over to forces commanded by Colonel Henry Bouquet.