166431234348979 has 2 divisors, whose sum is σ = 166431234348980. Its totient is φ = 166431234348978.

The previous prime is 166431234348961. The next prime is 166431234349007. The reversal of 166431234348979 is 979843432134661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166431234348979 - 2¹⁵ = 166431234316211 is a prime.

It is not a weakly prime, because it can be changed into another prime (166431234348949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83215617174489 + 83215617174490.

It is an arithmetic number, because the mean of its divisors is an integer number (83215617174490).

Almost surely, 2^{166431234348979} is an apocalyptic number.

166431234348979 is a deficient number, since it is larger than the sum of its proper divisors (1).

166431234348979 is an equidigital number, since it uses as much as digits as its factorization.

166431234348979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 564350976, while the sum is 70.

The spelling of 166431234348979 in words is "one hundred sixty-six trillion, four hundred thirty-one billion, two hundred thirty-four million, three hundred forty-eight thousand, nine hundred seventy-nine".