666558547139 has 2 divisors, whose sum is σ = 666558547140. Its totient is φ = 666558547138.

The previous prime is 666558547021. The next prime is 666558547157. The reversal of 666558547139 is 931745855666.

666558547139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 666558547139 - 2²⁴ = 666541769923 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (666558547159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333279273569 + 333279273570.

It is an arithmetic number, because the mean of its divisors is an integer number (333279273570).

Almost surely, 2^666558547139 is an apocalyptic number.

666558547139 is a deficient number, since it is larger than the sum of its proper divisors (1).

666558547139 is an equidigital number, since it uses as much as digits as its factorization.

666558547139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296000, while the sum is 65.

The spelling of 666558547139 in words is "six hundred sixty-six billion, five hundred fifty-eight million, five hundred forty-seven thousand, one hundred thirty-nine".