656057201660 has 48 divisors (see below), whose sum is σ = 1594468162560. Its totient is φ = 222086629440.

The previous prime is 656057201659. The next prime is 656057201689. The reversal of 656057201660 is 66102750656.

It is a super-2 number, since 2×656057201660² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29647946 + ... + 29670065.

It is an arithmetic number, because the mean of its divisors is an integer number (33218086720).

Almost surely, 2^656057201660 is an apocalyptic number.

It is an amenable number.

656057201660 is an abundant number, since it is smaller than the sum of its proper divisors (938410960900).

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

656057201660 is a wasteful number, since it uses less digits than its factorization.

656057201660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59318106 (or 59318104 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 44.

The spelling of 656057201660 in words is "six hundred fifty-six billion, fifty-seven million, two hundred one thousand, six hundred sixty".