General fact: 26666 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 26666 is an unremarkable number.
Trivia: 26666 is an uninteresting number.
Historical date: January 2nd is the day in 1860 that the discovery of the planet Vulcan is announced at a meeting of the French Academy of Sciences in Paris, France.