Fatto generale: 4866 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 4866 is the number of partitions of 48 in which no part occurs only once.
Trivia: 4866 is an uninteresting number.
Data storica: April 27th is the day in 1578 that Duel of the Mignons claims the lives of two favourites of Henry III of France and two favorites of Henry I, Duke of Guise.