866786515814504 has 32 divisors (see below), whose sum is σ = 1626307038972000. Its totient is φ = 433104644087232.

The previous prime is 866786515814503. The next prime is 866786515814509. The reversal of 866786515814504 is 405418515687668.

It is not an unprimeable number, because it can be changed into a prime (866786515814503) 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 7 ways as a sum of consecutive naturals, for example, 1632134642 + ... + 1632665630.

It is an arithmetic number, because the mean of its divisors is an integer number (50822094967875).

Almost surely, 2^{866786515814504} is an apocalyptic number.

It is an amenable number.

866786515814504 is a deficient number, since it is larger than the sum of its proper divisors (759520523157496).

866786515814504 is a wasteful number, since it uses less digits than its factorization.

866786515814504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666497 (or 666493 counting only the distinct ones).

The product of its (nonzero) digits is 1548288000, while the sum is 74.

The spelling of 866786515814504 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, five hundred fifteen million, eight hundred fourteen thousand, five hundred four".