166174159 has 2 divisors, whose sum is σ = 166174160. Its totient is φ = 166174158.

The previous prime is 166174157. The next prime is 166174181. The reversal of 166174159 is 951471661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166174159 - 2¹ = 166174157 is a prime.

It is a super-2 number, since 2×166174159² = 55227702238714562, which contains 22 as substring.

Together with 166174157, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166174157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83087079 + 83087080.

It is an arithmetic number, because the mean of its divisors is an integer number (83087080).

Almost surely, 2^166174159 is an apocalyptic number.

166174159 is a deficient number, since it is larger than the sum of its proper divisors (1).

166174159 is an equidigital number, since it uses as much as digits as its factorization.

166174159 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 40.

The square root of 166174159 is about 12890.8556349065. The cubic root of 166174159 is about 549.7785984905.

The spelling of 166174159 in words is "one hundred sixty-six million, one hundred seventy-four thousand, one hundred fifty-nine".