666558565855711 has 2 divisors, whose sum is σ = 666558565855712. Its totient is φ = 666558565855710.

The previous prime is 666558565855657. The next prime is 666558565855757. The reversal of 666558565855711 is 117558565855666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 666558565855711 - 2⁷ = 666558565855583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666558565855771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333279282927855 + 333279282927856.

It is an arithmetic number, because the mean of its divisors is an integer number (333279282927856).

Almost surely, 2^{666558565855711} is an apocalyptic number.

666558565855711 is a deficient number, since it is larger than the sum of its proper divisors (1).

666558565855711 is an equidigital number, since it uses as much as digits as its factorization.

666558565855711 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072000000, while the sum is 79.

The spelling of 666558565855711 in words is "six hundred sixty-six trillion, five hundred fifty-eight billion, five hundred sixty-five million, eight hundred fifty-five thousand, seven hundred eleven".