Fatto generale: 6579 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 6579 is the number of ways to color the vertices of a triangle with 27 colors, up to rotation.
Trivia: 6579 is a boring number.
Data storica: January 4th is the day in 1865 that the New York Stock Exchange opens its first permanent headquarters at 10-12 Broad near Wall Street in New York, New York.