22666891 has 24 divisors (see below), whose sum is σ = 26714016. Its totient is φ = 19071360.

The previous prime is 22666883. The next prime is 22666913. The reversal of 22666891 is 19866622.

It is a happy number.

It is not a de Polignac number, because 22666891 - 2³ = 22666883 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22666801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 527116 + ... + 527158.

It is an arithmetic number, because the mean of its divisors is an integer number (1113084).

Almost surely, 2^22666891 is an apocalyptic number.

22666891 is a deficient number, since it is larger than the sum of its proper divisors (4047125).

22666891 is a wasteful number, since it uses less digits than its factorization.

22666891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163 (or 120 counting only the distinct ones).

The product of its digits is 62208, while the sum is 40.

The square root of 22666891 is about 4760.9758453494. The cubic root of 22666891 is about 283.0070919323.

The spelling of 22666891 in words is "twenty-two million, six hundred sixty-six thousand, eight hundred ninety-one".