685660312 has 32 divisors (see below), whose sum is σ = 1314331200. Its totient is φ = 335247264.

The previous prime is 685660307. The next prime is 685660319. The reversal of 685660312 is 213066586.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685660319) 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, 69903 + ... + 79105.

It is an arithmetic number, because the mean of its divisors is an integer number (41072850).

Almost surely, 2^685660312 is an apocalyptic number.

It is an amenable number.

685660312 is a deficient number, since it is larger than the sum of its proper divisors (628670888).

685660312 is a wasteful number, since it uses less digits than its factorization.

685660312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9415 (or 9411 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 685660312 is about 26185.1162304084. The cubic root of 685660312 is about 881.7991394426.

The spelling of 685660312 in words is "six hundred eighty-five million, six hundred sixty thousand, three hundred twelve".