56661488416679 has 2 divisors, whose sum is σ = 56661488416680. Its totient is φ = 56661488416678.

The previous prime is 56661488416661. The next prime is 56661488416693. The reversal of 56661488416679 is 97661488416665.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56661488416679 - 2²⁴ = 56661471639463 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56661488416619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28330744208339 + 28330744208340.

It is an arithmetic number, because the mean of its divisors is an integer number (28330744208340).

Almost surely, 2^{56661488416679} is an apocalyptic number.

56661488416679 is a deficient number, since it is larger than the sum of its proper divisors (1).

56661488416679 is an equidigital number, since it uses as much as digits as its factorization.

56661488416679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2508226560, while the sum is 77.

The spelling of 56661488416679 in words is "fifty-six trillion, six hundred sixty-one billion, four hundred eighty-eight million, four hundred sixteen thousand, six hundred seventy-nine".