658960978657 has 2 divisors, whose sum is σ = 658960978658. Its totient is φ = 658960978656.

The previous prime is 658960978607. The next prime is 658960978661. The reversal of 658960978657 is 756879069856.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 653512176801 + 5448801856 = 808401^2 + 73816^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-658960978657 is a prime.

It is not a weakly prime, because it can be changed into another prime (658960978607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329480489328 + 329480489329.

It is an arithmetic number, because the mean of its divisors is an integer number (329480489329).

Almost surely, 2^658960978657 is an apocalyptic number.

It is an amenable number.

658960978657 is a deficient number, since it is larger than the sum of its proper divisors (1).

658960978657 is an equidigital number, since it uses as much as digits as its factorization.

658960978657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1371686400, while the sum is 76.

The spelling of 658960978657 in words is "six hundred fifty-eight billion, nine hundred sixty million, nine hundred seventy-eight thousand, six hundred fifty-seven".