656565130 has 32 divisors (see below), whose sum is σ = 1328068224. Its totient is φ = 231882816.

The previous prime is 656565079. The next prime is 656565131. The reversal of 656565130 is 31565656.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 656565130.

It is not an unprimeable number, because it can be changed into a prime (656565131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106804 + ... + 112783.

It is an arithmetic number, because the mean of its divisors is an integer number (41502132).

Almost surely, 2^656565130 is an apocalyptic number.

656565130 is an abundant number, since it is smaller than the sum of its proper divisors (671503094).

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

656565130 is a wasteful number, since it uses less digits than its factorization.

656565130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219630.

The product of its (nonzero) digits is 81000, while the sum is 37.

The square root of 656565130 is about 25623.5268844865. The cubic root of 656565130 is about 869.1457374104.

The spelling of 656565130 in words is "six hundred fifty-six million, five hundred sixty-five thousand, one hundred thirty".