656660513134513 has 2 divisors, whose sum is σ = 656660513134514. Its totient is φ = 656660513134512.

The previous prime is 656660513134511. The next prime is 656660513134583. The reversal of 656660513134513 is 315431315066656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 374496343240464 + 282164169894049 = 19351908^2 + 16797743^2 .

It is a cyclic number.

It is not a de Polignac number, because 656660513134513 - 2¹ = 656660513134511 is a prime.

Together with 656660513134511, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (656660513134511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328330256567256 + 328330256567257.

It is an arithmetic number, because the mean of its divisors is an integer number (328330256567257).

Almost surely, 2^{656660513134513} is an apocalyptic number.

It is an amenable number.

656660513134513 is a deficient number, since it is larger than the sum of its proper divisors (1).

656660513134513 is an equidigital number, since it uses as much as digits as its factorization.

656660513134513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496000, while the sum is 55.

The spelling of 656660513134513 in words is "six hundred fifty-six trillion, six hundred sixty billion, five hundred thirteen million, one hundred thirty-four thousand, five hundred thirteen".