22662991 has 8 divisors (see below), whose sum is σ = 25691120. Its totient is φ = 19818432.

The previous prime is 22662971. The next prime is 22663001. The reversal of 22662991 is 19926622.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22662991 - 2¹¹ = 22660943 is a prime.

It is a super-2 number, since 2×22662991² = 1027222322132162, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22662991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22662911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45630 + ... + 46123.

It is an arithmetic number, because the mean of its divisors is an integer number (3211390).

Almost surely, 2^22662991 is an apocalyptic number.

22662991 is a deficient number, since it is larger than the sum of its proper divisors (3028129).

22662991 is a wasteful number, since it uses less digits than its factorization.

22662991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91785.

The product of its digits is 23328, while the sum is 37.

The square root of 22662991 is about 4760.5662478323. The cubic root of 22662991 is about 282.9908598729.

It can be divided in two parts, 22662 and 991, that added together give a triangular number (23653 = T₂₁₇).

The spelling of 22662991 in words is "twenty-two million, six hundred sixty-two thousand, nine hundred ninety-one".