166493171 has 8 divisors (see below), whose sum is σ = 180213264. Its totient is φ = 152903520.

The previous prime is 166493153. The next prime is 166493203. The reversal of 166493171 is 171394661.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166493171 - 2¹⁴ = 166476787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166493111) 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 in 7 ways as a sum of consecutive naturals, for example, 29945 + ... + 35066.

It is an arithmetic number, because the mean of its divisors is an integer number (22526658).

Almost surely, 2^166493171 is an apocalyptic number.

166493171 is a deficient number, since it is larger than the sum of its proper divisors (13720093).

166493171 is a wasteful number, since it uses less digits than its factorization.

166493171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65221.

The product of its digits is 27216, while the sum is 38.

The square root of 166493171 is about 12903.2232794756. The cubic root of 166493171 is about 550.1301851607.

The spelling of 166493171 in words is "one hundred sixty-six million, four hundred ninety-three thousand, one hundred seventy-one".