166972894 has 16 divisors (see below), whose sum is σ = 282651120. Its totient is φ = 73279360.

The previous prime is 166972877. The next prime is 166972903. The reversal of 166972894 is 498279661.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 130219 + ... + 131494.

It is an arithmetic number, because the mean of its divisors is an integer number (17665695).

Almost surely, 2^166972894 is an apocalyptic number.

166972894 is a deficient number, since it is larger than the sum of its proper divisors (115678226).

166972894 is a wasteful number, since it uses less digits than its factorization.

166972894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261755.

The product of its digits is 1306368, while the sum is 52.

The square root of 166972894 is about 12921.7991781331. The cubic root of 166972894 is about 550.6580487258.

It can be divided in two parts, 16697 and 2894, that added together give a palindrome (19591).

The spelling of 166972894 in words is "one hundred sixty-six million, nine hundred seventy-two thousand, eight hundred ninety-four".