166317927 has 4 divisors (see below), whose sum is σ = 221757240. Its totient is φ = 110878616.

The previous prime is 166317917. The next prime is 166317947. The reversal of 166317927 is 729713661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166317927 - 2⁷ = 166317799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166317917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27719652 + ... + 27719657.

It is an arithmetic number, because the mean of its divisors is an integer number (55439310).

Almost surely, 2^166317927 is an apocalyptic number.

166317927 is a deficient number, since it is larger than the sum of its proper divisors (55439313).

166317927 is an equidigital number, since it uses as much as digits as its factorization.

166317927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55439312.

The product of its digits is 95256, while the sum is 42.

The square root of 166317927 is about 12896.4307852987. The cubic root of 166317927 is about 549.9371024492.

The spelling of 166317927 in words is "one hundred sixty-six million, three hundred seventeen thousand, nine hundred twenty-seven".