656622 has 12 divisors (see below), whose sum is σ = 1422720. Its totient is φ = 218868.

The previous prime is 656609. The next prime is 656651. The reversal of 656622 is 226656.

656622 is a `hidden beast` number, since 656 + 6 + 2 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

656622 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18222 + ... + 18257.

It is an arithmetic number, because the mean of its divisors is an integer number (118560).

2⁶⁵⁶⁶²² is an apocalyptic number.

656622 is an abundant number, since it is smaller than the sum of its proper divisors (766098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

656622 is a wasteful number, since it uses less digits than its factorization.

656622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36487 (or 36484 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 656622 is about 810.3221581569. The cubic root of 656622 is about 86.9170831083.

The spelling of 656622 in words is "six hundred fifty-six thousand, six hundred twenty-two".