166956159 has 4 divisors (see below), whose sum is σ = 222608216. Its totient is φ = 111304104.

The previous prime is 166956113. The next prime is 166956169. The reversal of 166956159 is 951659661.

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

It is not a de Polignac number, because 166956159 - 2⁸ = 166955903 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 (166956169) 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, 27826024 + ... + 27826029.

It is an arithmetic number, because the mean of its divisors is an integer number (55652054).

Almost surely, 2^166956159 is an apocalyptic number.

166956159 is a deficient number, since it is larger than the sum of its proper divisors (55652057).

166956159 is an equidigital number, since it uses as much as digits as its factorization.

166956159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55652056.

The product of its digits is 437400, while the sum is 48.

The square root of 166956159 is about 12921.1516127627. The cubic root of 166956159 is about 550.6396513877.

The spelling of 166956159 in words is "one hundred sixty-six million, nine hundred fifty-six thousand, one hundred fifty-nine".