866686336 has 16 divisors (see below), whose sum is σ = 1726601940. Its totient is φ = 433343104.

The previous prime is 866686309. The next prime is 866686343. The reversal of 866686336 is 633686668.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×866686336² = 1502290410018209792, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3385366 + ... + 3385621.

Almost surely, 2^866686336 is an apocalyptic number.

It is an amenable number.

866686336 is a deficient number, since it is larger than the sum of its proper divisors (859915604).

866686336 is an equidigital number, since it uses as much as digits as its factorization.

866686336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6771001 (or 6770989 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 52.

The square root of 866686336 is about 29439.5369528802. The cubic root of 866686336 is about 953.4267146806.

The spelling of 866686336 in words is "eight hundred sixty-six million, six hundred eighty-six thousand, three hundred thirty-six".