366 (three hundred [and] sixty six) is the natural number following 365 and preceding 367. In Roman numeral, it is written as CCCLXVI.
In mathematics 366 prime Factorization is 2 × 3 × 61, meaning it is a composite number. 366 is also a sphenic number.
The value of p(366) is prime.
366 is the number of unimodular 2 X 2 matrices having all terms in {0,1,...,12} and inverses with all terms integers.
In other fields
A leap year is a calendar year that contains 366 days, one additional day than a common year which is February 29. The 366th day (or 13th month) is added to keep the calendar year synced with the astronomical year or seasonal year.
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