666880659200 has 432 divisors, whose sum is σ = 2004375670080. Its totient is φ = 214778511360.

The previous prime is 666880659169. The next prime is 666880659223. The reversal of 666880659200 is 2956088666.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 48063464 + ... + 48077336.

Almost surely, 2^666880659200 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666880659200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1002187835040).

666880659200 is an abundant number, since it is smaller than the sum of its proper divisors (1337495010880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666880659200 is a wasteful number, since it uses less digits than its factorization.

666880659200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13972 (or 13953 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 56.

The spelling of 666880659200 in words is "six hundred sixty-six billion, eight hundred eighty million, six hundred fifty-nine thousand, two hundred".