666177016239 has 72 divisors (see below), whose sum is σ = 1157366500992. Its totient is φ = 367787226240.

The previous prime is 666177016129. The next prime is 666177016289. The reversal of 666177016239 is 932610771666.

It is a happy number.

It is not a de Polignac number, because 666177016239 - 2⁹ = 666177015727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666177016289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 8340577 + ... + 8420069.

It is an arithmetic number, because the mean of its divisors is an integer number (16074534736).

Almost surely, 2^666177016239 is an apocalyptic number.

666177016239 is a deficient number, since it is larger than the sum of its proper divisors (491189484753).

666177016239 is a wasteful number, since it uses less digits than its factorization.

666177016239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80157 (or 80147 counting only the distinct ones).

The product of its (nonzero) digits is 3429216, while the sum is 54.

The spelling of 666177016239 in words is "six hundred sixty-six billion, one hundred seventy-seven million, sixteen thousand, two hundred thirty-nine".