655960685 has 4 divisors (see below), whose sum is σ = 787152828. Its totient is φ = 524768544.

The previous prime is 655960663. The next prime is 655960709. The reversal of 655960685 is 586069556.

655960685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 349465636 + 306495049 = 18694^2 + 17507^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-655960685 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65596064 + ... + 65596073.

It is an arithmetic number, because the mean of its divisors is an integer number (196788207).

Almost surely, 2^655960685 is an apocalyptic number.

It is an amenable number.

655960685 is a deficient number, since it is larger than the sum of its proper divisors (131192143).

655960685 is a wasteful number, since it uses less digits than its factorization.

655960685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131192142.

The product of its (nonzero) digits is 1944000, while the sum is 50.

The square root of 655960685 is about 25611.7294418007. The cubic root of 655960685 is about 868.8789387491.

The spelling of 655960685 in words is "six hundred fifty-five million, nine hundred sixty thousand, six hundred eighty-five".