656885 has 8 divisors (see below), whose sum is σ = 798720. Its totient is φ = 518544.

The previous prime is 656839. The next prime is 656891. The reversal of 656885 is 588656.

656885 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-656885 is a prime.

It is a super-3 number, since 3×656885³ = 850333500479862375, which contains 333 as substring.

It is a Curzon number.

It is a zygodrome in base 4.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 437 + ... + 1226.

It is an arithmetic number, because the mean of its divisors is an integer number (99840).

2⁶⁵⁶⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

656885 is a deficient number, since it is larger than the sum of its proper divisors (141835).

656885 is a wasteful number, since it uses less digits than its factorization.

656885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1747.

The product of its digits is 57600, while the sum is 38.

The square root of 656885 is about 810.4844230459. The cubic root of 656885 is about 86.9286859998.

The spelling of 656885 in words is "six hundred fifty-six thousand, eight hundred eighty-five".