22178668 has 6 divisors (see below), whose sum is σ = 38812676. Its totient is φ = 11089332.

The previous prime is 22178633. The next prime is 22178677. The reversal of 22178668 is 86687122.

It is a self number, because there is not a number n which added to its sum of digits gives 22178668.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2772330 + ... + 2772337.

Almost surely, 2^22178668 is an apocalyptic number.

It is an amenable number.

22178668 is a deficient number, since it is larger than the sum of its proper divisors (16634008).

22178668 is a wasteful number, since it uses less digits than its factorization.

22178668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5544671 (or 5544669 counting only the distinct ones).

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

The square root of 22178668 is about 4709.4233192611. The cubic root of 22178668 is about 280.9604263702.

The spelling of 22178668 in words is "twenty-two million, one hundred seventy-eight thousand, six hundred sixty-eight".