656580474899 has 8 divisors (see below), whose sum is σ = 683388186960. Its totient is φ = 630050563296.

The previous prime is 656580474883. The next prime is 656580474911. The reversal of 656580474899 is 998474085656.

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

It is a cyclic number.

It is not a de Polignac number, because 656580474899 - 2⁴ = 656580474883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (656580474859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69445292 + ... + 69454745.

It is an arithmetic number, because the mean of its divisors is an integer number (85423523370).

Almost surely, 2^656580474899 is an apocalyptic number.

656580474899 is a deficient number, since it is larger than the sum of its proper divisors (26807712061).

656580474899 is a wasteful number, since it uses less digits than its factorization.

656580474899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138900229.

The product of its (nonzero) digits is 522547200, while the sum is 71.

The spelling of 656580474899 in words is "six hundred fifty-six billion, five hundred eighty million, four hundred seventy-four thousand, eight hundred ninety-nine".