656880566 has 8 divisors (see below), whose sum is σ = 1019297520. Its totient is φ = 317114728.

The previous prime is 656880563. The next prime is 656880583. The reversal of 656880566 is 665088656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656880563) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5662706 + ... + 5662821.

It is an arithmetic number, because the mean of its divisors is an integer number (127412190).

Almost surely, 2^656880566 is an apocalyptic number.

656880566 is a deficient number, since it is larger than the sum of its proper divisors (362416954).

656880566 is a wasteful number, since it uses less digits than its factorization.

656880566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11325558.

The product of its (nonzero) digits is 2073600, while the sum is 50.

The square root of 656880566 is about 25629.6813479996. The cubic root of 656880566 is about 869.2849040870.

The spelling of 656880566 in words is "six hundred fifty-six million, eight hundred eighty thousand, five hundred sixty-six".