866788526228031 has 12 divisors (see below), whose sum is σ = 1365848586783720. Its totient is φ = 525326379532080.

The previous prime is 866788526227973. The next prime is 866788526228041. The reversal of 866788526228031 is 130822625887668.

866788526228031 is a `hidden beast` number, since 8 + 6 + 6 + 7 + 8 + 85 + 262 + 280 + 3 + 1 = 666.

It is not a de Polignac number, because 866788526228031 - 2¹⁰ = 866788526227007 is a prime.

It is a super-2 number, since 2×866788526228031² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866788526228041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4377719829336 + ... + 4377719829533.

It is an arithmetic number, because the mean of its divisors is an integer number (113820715565310).

Almost surely, 2^{866788526228031} is an apocalyptic number.

866788526228031 is a deficient number, since it is larger than the sum of its proper divisors (499060060555689).

866788526228031 is a wasteful number, since it uses less digits than its factorization.

866788526228031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8755439658886 (or 8755439658883 counting only the distinct ones).

The product of its (nonzero) digits is 743178240, while the sum is 72.

The spelling of 866788526228031 in words is "eight hundred sixty-six trillion, seven hundred eighty-eight billion, five hundred twenty-six million, two hundred twenty-eight thousand, thirty-one".