Fatto matematico: 1166 is a heptagonal pyramidal number.
Trivia: 1166 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: March 11th is the day in 2011 that an earthquake measuring 9.0 in magnitude strikes 130 km (81 mi) east of Sendai, Japan, triggering a tsunami killing thousands of people.