866864458 has 8 divisors (see below), whose sum is σ = 1300422852. Its totient is φ = 433390176.

The previous prime is 866864447. The next prime is 866864483. The reversal of 866864458 is 854468668.

It can be written as a sum of positive squares in 2 ways, for example, as 801852489 + 65011969 = 28317^2 + 8063^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 866864399 and 866864408.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24166 + ... + 48142.

Almost surely, 2^866864458 is an apocalyptic number.

866864458 is a deficient number, since it is larger than the sum of its proper divisors (433558394).

866864458 is a wasteful number, since it uses less digits than its factorization.

866864458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42056.

The product of its digits is 8847360, while the sum is 55.

The square root of 866864458 is about 29442.5620148791. The cubic root of 866864458 is about 953.4920265215.

The spelling of 866864458 in words is "eight hundred sixty-six million, eight hundred sixty-four thousand, four hundred fifty-eight".