166661310414239 has 2 divisors, whose sum is σ = 166661310414240. Its totient is φ = 166661310414238.

The previous prime is 166661310414227. The next prime is 166661310414251. The reversal of 166661310414239 is 932414013166661.

It is a balanced prime because it is at equal distance from previous prime (166661310414227) and next prime (166661310414251).

It is a cyclic number.

It is not a de Polignac number, because 166661310414239 - 2³⁶ = 166592590937503 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166661310414259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83330655207119 + 83330655207120.

It is an arithmetic number, because the mean of its divisors is an integer number (83330655207120).

Almost surely, 2^{166661310414239} is an apocalyptic number.

166661310414239 is a deficient number, since it is larger than the sum of its proper divisors (1).

166661310414239 is an equidigital number, since it uses as much as digits as its factorization.

166661310414239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3359232, while the sum is 53.

The spelling of 166661310414239 in words is "one hundred sixty-six trillion, six hundred sixty-one billion, three hundred ten million, four hundred fourteen thousand, two hundred thirty-nine".