656220060 has 72 divisors (see below), whose sum is σ = 2107634256. Its totient is φ = 164697600.

The previous prime is 656220031. The next prime is 656220073. The reversal of 656220060 is 60022656.

656220060 is a `hidden beast` number, since 656 + 2 + 2 + 0 + 0 + 6 + 0 = 666.

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 23 ways as a sum of consecutive naturals, for example, 104166 + ... + 110285.

It is an arithmetic number, because the mean of its divisors is an integer number (29272698).

Almost surely, 2^656220060 is an apocalyptic number.

656220060 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

656220060 is an abundant number, since it is smaller than the sum of its proper divisors (1451414196).

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

656220060 is a wasteful number, since it uses less digits than its factorization.

656220060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214483 (or 214478 counting only the distinct ones).

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

The square root of 656220060 is about 25616.7925392700. The cubic root of 656220060 is about 868.9934454984.

The spelling of 656220060 in words is "six hundred fifty-six million, two hundred twenty thousand, sixty".