656888074673 has 2 divisors, whose sum is σ = 656888074674. Its totient is φ = 656888074672.

The previous prime is 656888074631. The next prime is 656888074763. The reversal of 656888074673 is 376470888656.

Together with next prime (656888074763) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 652594155889 + 4293918784 = 807833^2 + 65528^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-656888074673 is a prime.

It is not a weakly prime, because it can be changed into another prime (656888074273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328444037336 + 328444037337.

It is an arithmetic number, because the mean of its divisors is an integer number (328444037337).

Almost surely, 2^656888074673 is an apocalyptic number.

It is an amenable number.

656888074673 is a deficient number, since it is larger than the sum of its proper divisors (1).

656888074673 is an equidigital number, since it uses as much as digits as its factorization.

656888074673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 325140480, while the sum is 68.

The spelling of 656888074673 in words is "six hundred fifty-six billion, eight hundred eighty-eight million, seventy-four thousand, six hundred seventy-three".