866274864 has 80 divisors (see below), whose sum is σ = 2754323712. Its totient is φ = 228466944.

The previous prime is 866274841. The next prime is 866274883. The reversal of 866274864 is 468472668.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94794 + ... + 103529.

Almost surely, 2^866274864 is an apocalyptic number.

866274864 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

866274864 is an abundant number, since it is smaller than the sum of its proper divisors (1888048848).

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

866274864 is a wasteful number, since it uses less digits than its factorization.

866274864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198354 (or 198348 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 51.

The square root of 866274864 is about 29432.5476980842. The cubic root of 866274864 is about 953.2758063754.

The spelling of 866274864 in words is "eight hundred sixty-six million, two hundred seventy-four thousand, eight hundred sixty-four".