166972892 has 6 divisors (see below), whose sum is σ = 292202568. Its totient is φ = 83486444.

The previous prime is 166972877. The next prime is 166972903. The reversal of 166972892 is 298279661.

It is a happy number.

It is a super-5 number, since 5×166972892⁵ (a number of 42 digits) contains 55555 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 166972892.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20871608 + ... + 20871615.

It is an arithmetic number, because the mean of its divisors is an integer number (48700428).

Almost surely, 2^166972892 is an apocalyptic number.

It is an amenable number.

166972892 is a deficient number, since it is larger than the sum of its proper divisors (125229676).

166972892 is a wasteful number, since it uses less digits than its factorization.

166972892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41743227 (or 41743225 counting only the distinct ones).

The product of its digits is 653184, while the sum is 50.

The square root of 166972892 is about 12921.7991007444. The cubic root of 166972892 is about 550.6580465272.

The spelling of 166972892 in words is "one hundred sixty-six million, nine hundred seventy-two thousand, eight hundred ninety-two".