166105171 has 2 divisors, whose sum is σ = 166105172. Its totient is φ = 166105170.

The previous prime is 166105157. The next prime is 166105193. The reversal of 166105171 is 171501661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166105171 - 2¹³ = 166096979 is a prime.

It is not a weakly prime, because it can be changed into another prime (166105111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83052585 + 83052586.

It is an arithmetic number, because the mean of its divisors is an integer number (83052586).

Almost surely, 2^166105171 is an apocalyptic number.

166105171 is a deficient number, since it is larger than the sum of its proper divisors (1).

166105171 is an equidigital number, since it uses as much as digits as its factorization.

166105171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 28.

The square root of 166105171 is about 12888.1795068194. The cubic root of 166105171 is about 549.7025068846.

The spelling of 166105171 in words is "one hundred sixty-six million, one hundred five thousand, one hundred seventy-one".