866688264 has 48 divisors (see below), whose sum is σ = 2527843500. Its totient is φ = 266673024.

The previous prime is 866688239. The next prime is 866688281. The reversal of 866688264 is 462886668.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 861892164 + 4796100 = 29358^2 + 2190^2 .

It is a super-2 number, since 2×866688264² = 1502297093910667392, which contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

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

It is a self number, because there is not a number n which added to its sum of digits gives 866688264.

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 11 ways as a sum of consecutive naturals, for example, 462039 + ... + 463910.

Almost surely, 2^866688264 is an apocalyptic number.

It is an amenable number.

866688264 is an abundant number, since it is smaller than the sum of its proper divisors (1661155236).

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

866688264 is a wasteful number, since it uses less digits than its factorization.

866688264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925974 (or 925967 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 54.

The square root of 866688264 is about 29439.5696979423. The cubic root of 866688264 is about 953.4274216666.

The spelling of 866688264 in words is "eight hundred sixty-six million, six hundred eighty-eight thousand, two hundred sixty-four".