22166878 has 12 divisors (see below), whose sum is σ = 35322192. Its totient is φ = 10431200.

The previous prime is 22166843. The next prime is 22166899. The reversal of 22166878 is 87866122.

It is a self number, because there is not a number n which added to its sum of digits gives 22166878.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18598 + ... + 19753.

It is an arithmetic number, because the mean of its divisors is an integer number (2943516).

Almost surely, 2^22166878 is an apocalyptic number.

22166878 is a deficient number, since it is larger than the sum of its proper divisors (13155314).

22166878 is a wasteful number, since it uses less digits than its factorization.

22166878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38387 (or 38370 counting only the distinct ones).

The product of its digits is 64512, while the sum is 40.

The square root of 22166878 is about 4708.1714072451. The cubic root of 22166878 is about 280.9106321179.

The spelling of 22166878 in words is "twenty-two million, one hundred sixty-six thousand, eight hundred seventy-eight".