866686913 has 8 divisors (see below), whose sum is σ = 877685088. Its totient is φ = 855702144.

The previous prime is 866686883. The next prime is 866686937. The reversal of 866686913 is 319686668.

866686913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 866686913 - 2⁸ = 866686657 is a prime.

It is a super-2 number, since 2×866686913² = 1502292410330939138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866686993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213206 + ... + 217232.

It is an arithmetic number, because the mean of its divisors is an integer number (109710636).

Almost surely, 2^866686913 is an apocalyptic number.

866686913 is a gapful number since it is divisible by the number (83) formed by its first and last digit.

It is an amenable number.

866686913 is a deficient number, since it is larger than the sum of its proper divisors (10998175).

866686913 is a wasteful number, since it uses less digits than its factorization.

866686913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6703.

The product of its digits is 2239488, while the sum is 53.

The square root of 866686913 is about 29439.5467526251. The cubic root of 866686913 is about 953.4269262632.

The spelling of 866686913 in words is "eight hundred sixty-six million, six hundred eighty-six thousand, nine hundred thirteen".