556660655651 has 2 divisors, whose sum is σ = 556660655652. Its totient is φ = 556660655650.

The previous prime is 556660655647. The next prime is 556660655657. The reversal of 556660655651 is 156556066655.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 556660655651 - 2² = 556660655647 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (556660655657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278330327825 + 278330327826.

It is an arithmetic number, because the mean of its divisors is an integer number (278330327826).

Almost surely, 2^556660655651 is an apocalyptic number.

556660655651 is a deficient number, since it is larger than the sum of its proper divisors (1).

556660655651 is an equidigital number, since it uses as much as digits as its factorization.

556660655651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24300000, while the sum is 56.

The spelling of 556660655651 in words is "five hundred fifty-six billion, six hundred sixty million, six hundred fifty-five thousand, six hundred fifty-one".