686855675 has 24 divisors (see below), whose sum is σ = 983789712. Its totient is φ = 470144000.

The previous prime is 686855621. The next prime is 686855683. The reversal of 686855675 is 576558686.

It is not a de Polignac number, because 686855675 - 2⁸ = 686855419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 686855675.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 68786 + ... + 78135.

It is an arithmetic number, because the mean of its divisors is an integer number (40991238).

Almost surely, 2^686855675 is an apocalyptic number.

686855675 is a deficient number, since it is larger than the sum of its proper divisors (296934037).

686855675 is a wasteful number, since it uses less digits than its factorization.

686855675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146959 (or 146954 counting only the distinct ones).

The product of its digits is 12096000, while the sum is 56.

The square root of 686855675 is about 26207.9315284515. The cubic root of 686855675 is about 882.3112774467.

The spelling of 686855675 in words is "six hundred eighty-six million, eight hundred fifty-five thousand, six hundred seventy-five".