686507075 has 12 divisors (see below), whose sum is σ = 872032728. Its totient is φ = 535809600.

The previous prime is 686507071. The next prime is 686507123. The reversal of 686507075 is 570705686.

It is not a de Polignac number, because 686507075 - 2² = 686507071 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (686507071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 333857 + ... + 335906.

It is an arithmetic number, because the mean of its divisors is an integer number (72669394).

Almost surely, 2^686507075 is an apocalyptic number.

686507075 is a deficient number, since it is larger than the sum of its proper divisors (185525653).

686507075 is a wasteful number, since it uses less digits than its factorization.

686507075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669814 (or 669809 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 44.

The square root of 686507075 is about 26201.2800259835. The cubic root of 686507075 is about 882.1619856466.

The spelling of 686507075 in words is "six hundred eighty-six million, five hundred seven thousand, seventy-five".