22621665 has 32 divisors (see below), whose sum is σ = 40061952. Its totient is φ = 10808000.

The previous prime is 22621663. The next prime is 22621681. The reversal of 22621665 is 56612622.

It is not a de Polignac number, because 22621665 - 2¹ = 22621663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22621663) by changing a digit.

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 in 31 ways as a sum of consecutive naturals, for example, 10750 + ... + 12680.

It is an arithmetic number, because the mean of its divisors is an integer number (1251936).

Almost surely, 2^22621665 is an apocalyptic number.

It is an amenable number.

22621665 is a deficient number, since it is larger than the sum of its proper divisors (17440287).

22621665 is a wasteful number, since it uses less digits than its factorization.

22621665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2021.

The product of its digits is 8640, while the sum is 30.

The square root of 22621665 is about 4756.2238172735. The cubic root of 22621665 is about 282.8187437853.

The spelling of 22621665 in words is "twenty-two million, six hundred twenty-one thousand, six hundred sixty-five".