166956395 has 12 divisors (see below), whose sum is σ = 205917264. Its totient is φ = 129949920.

The previous prime is 166956389. The next prime is 166956397. The reversal of 166956395 is 593659661.

It is not a de Polignac number, because 166956395 - 2⁶ = 166956331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166956397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5351 + ... + 19040.

It is an arithmetic number, because the mean of its divisors is an integer number (17159772).

Almost surely, 2^166956395 is an apocalyptic number.

166956395 is a deficient number, since it is larger than the sum of its proper divisors (38960869).

166956395 is an equidigital number, since it uses as much as digits as its factorization.

166956395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24470 (or 24433 counting only the distinct ones).

The product of its digits is 1312200, while the sum is 50.

The square root of 166956395 is about 12921.1607450724. The cubic root of 166956395 is about 550.6399108389.

The spelling of 166956395 in words is "one hundred sixty-six million, nine hundred fifty-six thousand, three hundred ninety-five".