686843910675 has 72 divisors (see below), whose sum is σ = 1382447705184. Its totient is φ = 323436833280.

The previous prime is 686843910607. The next prime is 686843910689. The reversal of 686843910675 is 576019348686.

686843910675 is a `hidden beast` number, since 68 + 68 + 439 + 10 + 6 + 75 = 666.

It is not a de Polignac number, because 686843910675 - 2⁷ = 686843910547 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 5037474 + ... + 5172023.

It is an arithmetic number, because the mean of its divisors is an integer number (19200662572).

Almost surely, 2^686843910675 is an apocalyptic number.

686843910675 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

686843910675 is an abundant number, since it is smaller than the sum of its proper divisors (695603794509).

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

686843910675 is a wasteful number, since it uses less digits than its factorization.

686843910675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10209549 (or 10209541 counting only the distinct ones).

The product of its (nonzero) digits is 52254720, while the sum is 63.

The spelling of 686843910675 in words is "six hundred eighty-six billion, eight hundred forty-three million, nine hundred ten thousand, six hundred seventy-five".