General fact: 260 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 260 is the constant of an 8×8 magic square.
Trivia: 260 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Historical date: September 16th is the day in 1978 that an earthquake measuring 7.5 to 7.9 on the Richter scale hits the city of Tabas, Iran killing about 25,000 people.