22008664 has 8 divisors (see below), whose sum is σ = 41266260. Its totient is φ = 11004328.

The previous prime is 22008661. The next prime is 22008691. The reversal of 22008664 is 46680022.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22008661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1375534 + ... + 1375549.

Almost surely, 2^22008664 is an apocalyptic number.

It is an amenable number.

22008664 is a deficient number, since it is larger than the sum of its proper divisors (19257596).

22008664 is a wasteful number, since it uses less digits than its factorization.

22008664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2751089 (or 2751085 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 22008664 is about 4691.3392544134. The cubic root of 22008664 is about 280.2407113725.

Adding to 22008664 its reverse (46680022), we get a palindrome (68688686).

The spelling of 22008664 in words is "twenty-two million, eight thousand, six hundred sixty-four".