666553354966159 has 2 divisors, whose sum is σ = 666553354966160. Its totient is φ = 666553354966158.

The previous prime is 666553354966141. The next prime is 666553354966193. The reversal of 666553354966159 is 951669453355666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 666553354966159 - 2³⁵ = 666518995227791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666553354966559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333276677483079 + 333276677483080.

It is an arithmetic number, because the mean of its divisors is an integer number (333276677483080).

Almost surely, 2^{666553354966159} is an apocalyptic number.

666553354966159 is a deficient number, since it is larger than the sum of its proper divisors (1).

666553354966159 is an equidigital number, since it uses as much as digits as its factorization.

666553354966159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14171760000, while the sum is 79.

The spelling of 666553354966159 in words is "six hundred sixty-six trillion, five hundred fifty-three billion, three hundred fifty-four million, nine hundred sixty-six thousand, one hundred fifty-nine".