166219271 has 8 divisors (see below), whose sum is σ = 173476080. Its totient is φ = 159064192.

The previous prime is 166219253. The next prime is 166219279. The reversal of 166219271 is 172912661.

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

It is a cyclic number.

It is not a de Polignac number, because 166219271 - 2¹⁴ = 166202887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166219279) 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 in 7 ways as a sum of consecutive naturals, for example, 22085 + ... + 28638.

It is an arithmetic number, because the mean of its divisors is an integer number (21684510).

Almost surely, 2^166219271 is an apocalyptic number.

166219271 is a deficient number, since it is larger than the sum of its proper divisors (7256809).

166219271 is a wasteful number, since it uses less digits than its factorization.

166219271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50865.

The product of its digits is 9072, while the sum is 35.

The square root of 166219271 is about 12892.6052836500. The cubic root of 166219271 is about 549.8283442277.

The spelling of 166219271 in words is "one hundred sixty-six million, two hundred nineteen thousand, two hundred seventy-one".