656975 has 12 divisors (see below), whose sum is σ = 889080. Its totient is φ = 477600.

The previous prime is 656959. The next prime is 656977. The reversal of 656975 is 579656.

It is not a de Polignac number, because 656975 - 2⁴ = 656959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 920 + ... + 1469.

It is an arithmetic number, because the mean of its divisors is an integer number (74090).

2⁶⁵⁶⁹⁷⁵ is an apocalyptic number.

656975 is a deficient number, since it is larger than the sum of its proper divisors (232105).

656975 is a wasteful number, since it uses less digits than its factorization.

656975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2410 (or 2405 counting only the distinct ones).

The product of its digits is 56700, while the sum is 38.

The square root of 656975 is about 810.5399434945. The cubic root of 656975 is about 86.9326558598.

The spelling of 656975 in words is "six hundred fifty-six thousand, nine hundred seventy-five".