866156182528804 has 48 divisors (see below), whose sum is σ = 1595870535672000. Its totient is φ = 410202314121600.

The previous prime is 866156182528729. The next prime is 866156182528939. The reversal of 866156182528804 is 408825281651668.

It is a happy number.

It is a super-2 number, since 2×866156182528804² (a number of 31 digits) contains 22 as substring.

It is an unprimeable number.

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, 9503429074 + ... + 9503520214.

It is an arithmetic number, because the mean of its divisors is an integer number (33247302826500).

Almost surely, 2^{866156182528804} is an apocalyptic number.

It is an amenable number.

866156182528804 is a deficient number, since it is larger than the sum of its proper divisors (729714353143196).

866156182528804 is a wasteful number, since it uses less digits than its factorization.

866156182528804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114844 (or 114842 counting only the distinct ones).

The product of its (nonzero) digits is 353894400, while the sum is 70.

The spelling of 866156182528804 in words is "eight hundred sixty-six trillion, one hundred fifty-six billion, one hundred eighty-two million, five hundred twenty-eight thousand, eight hundred four".