866857033358536 has 64 divisors (see below), whose sum is σ = 1782047381760000. Its totient is φ = 392041364996160.

The previous prime is 866857033358497. The next prime is 866857033358597. The reversal of 866857033358536 is 635853330758668.

It is a super-2 number, since 2×866857033358536² (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, 1861625535 + ... + 1862091121.

It is an arithmetic number, because the mean of its divisors is an integer number (27844490340000).

Almost surely, 2^{866857033358536} is an apocalyptic number.

It is an amenable number.

866857033358536 is an abundant number, since it is smaller than the sum of its proper divisors (915190348401464).

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

866857033358536 is a wasteful number, since it uses less digits than its factorization.

866857033358536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572122 (or 572118 counting only the distinct ones).

The product of its (nonzero) digits is 7838208000, while the sum is 76.

The spelling of 866857033358536 in words is "eight hundred sixty-six trillion, eight hundred fifty-seven billion, thirty-three million, three hundred fifty-eight thousand, five hundred thirty-six".