866757616075660 has 48 divisors (see below), whose sum is σ = 1899384536448000. Its totient is φ = 331619432010944.

The previous prime is 866757616075657. The next prime is 866757616075669. The reversal of 866757616075660 is 66570616757668.

It is a happy number.

It is a super-2 number, since 2×866757616075660² (a number of 31 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (866757616075669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11214760 + ... + 43119439.

It is an arithmetic number, because the mean of its divisors is an integer number (39570511176000).

Almost surely, 2^{866757616075660} is an apocalyptic number.

It is an amenable number.

866757616075660 is an abundant number, since it is smaller than the sum of its proper divisors (1032626920372340).

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

866757616075660 is a wasteful number, since it uses less digits than its factorization.

866757616075660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54368910 (or 54368908 counting only the distinct ones).

The product of its (nonzero) digits is 3200601600, while the sum is 76.

The spelling of 866757616075660 in words is "eight hundred sixty-six trillion, seven hundred fifty-seven billion, six hundred sixteen million, seventy-five thousand, six hundred sixty".