686718168 has 16 divisors (see below), whose sum is σ = 1716795480. Its totient is φ = 228906048.

The previous prime is 686718161. The next prime is 686718209. The reversal of 686718168 is 861817686.

It is a super-2 number, since 2×686718168² = 943163684522552448, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 686718168.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686718161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14306605 + ... + 14306652.

Almost surely, 2^686718168 is an apocalyptic number.

It is an amenable number.

686718168 is an abundant number, since it is smaller than the sum of its proper divisors (1030077312).

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

686718168 is a wasteful number, since it uses less digits than its factorization.

686718168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28613266 (or 28613262 counting only the distinct ones).

The product of its digits is 774144, while the sum is 51.

The square root of 686718168 is about 26205.3080119277. The cubic root of 686718168 is about 882.2523945894.

The spelling of 686718168 in words is "six hundred eighty-six million, seven hundred eighteen thousand, one hundred sixty-eight".