Fait mathématique: 6799 is the number of different degree sequences possible for a graph with 18 edges.
Culture générale: 6799 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: August 12th is the day in 2007 that the bulk carrier M/V New Flame collides with the oil tanker Torm Gertrud at the southernmost tip of Gibraltar, ending up partially submerged.