866158404863532 has 72 divisors (see below), whose sum is σ = 2226529924819200. Its totient is φ = 261874357044960.

The previous prime is 866158404863527. The next prime is 866158404863573. The reversal of 866158404863532 is 235368404851668.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 678779232 + ... + 680054087.

It is an arithmetic number, because the mean of its divisors is an integer number (30924026733600).

Almost surely, 2^{866158404863532} is an apocalyptic number.

It is an amenable number.

866158404863532 is an abundant number, since it is smaller than the sum of its proper divisors (1360371519955668).

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

866158404863532 is a wasteful number, since it uses less digits than its factorization.

866158404863532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1358833787 (or 1358833774 counting only the distinct ones).

The product of its (nonzero) digits is 796262400, while the sum is 69.

The spelling of 866158404863532 in words is "eight hundred sixty-six trillion, one hundred fifty-eight billion, four hundred four million, eight hundred sixty-three thousand, five hundred thirty-two".