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66! Factorial of 66

Value of 66! i.e, Factorial of 66 =
54434493907744306400
37292402478427526442
93064388798874532860
12686967108114841600
0000000000000



In general, the factorial of a number N = N*(N-1)*(N-2)....1
Factorial of a non-negative integer n is the product of all positive integers less than or equal to n. Factorials are commonly encountered in permutations, combinations, number theory and series expansions of trigonometric and other functions (Taylor series).

Number of trailing zeros in 66! = 15
To understand factorials, you might find it useful to read the Factorial tutorial over here.
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