656657022 has 64 divisors (see below), whose sum is σ = 1543716864. Its totient is φ = 182325600.

The previous prime is 656657003. The next prime is 656657039. The reversal of 656657022 is 220756656.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 296973 + ... + 299175.

It is an arithmetic number, because the mean of its divisors is an integer number (24120576).

Almost surely, 2^656657022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 656657022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (771858432).

656657022 is an abundant number, since it is smaller than the sum of its proper divisors (887059842).

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

656657022 is a wasteful number, since it uses less digits than its factorization.

656657022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2413.

The product of its (nonzero) digits is 151200, while the sum is 39.

The square root of 656657022 is about 25625.3199394661. The cubic root of 656657022 is about 869.1862836872.

The spelling of 656657022 in words is "six hundred fifty-six million, six hundred fifty-seven thousand, twenty-two".