166180153129 has 2 divisors, whose sum is σ = 166180153130. Its totient is φ = 166180153128.

The previous prime is 166180153099. The next prime is 166180153163. The reversal of 166180153129 is 921351081661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166180153104 + 25 = 407652^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 166180153129 - 2⁷ = 166180153001 is a prime.

It is not a weakly prime, because it can be changed into another prime (166180153189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83090076564 + 83090076565.

It is an arithmetic number, because the mean of its divisors is an integer number (83090076565).

Almost surely, 2^166180153129 is an apocalyptic number.

It is an amenable number.

166180153129 is a deficient number, since it is larger than the sum of its proper divisors (1).

166180153129 is an equidigital number, since it uses as much as digits as its factorization.

166180153129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 43.

The spelling of 166180153129 in words is "one hundred sixty-six billion, one hundred eighty million, one hundred fifty-three thousand, one hundred twenty-nine".