22664465 has 4 divisors (see below), whose sum is σ = 27197364. Its totient is φ = 18131568.

The previous prime is 22664459. The next prime is 22664471. The reversal of 22664465 is 56446622.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56446622 = 2 ⋅28223311.

It is an interprime number because it is at equal distance from previous prime (22664459) and next prime (22664471).

It can be written as a sum of positive squares in 2 ways, for example, as 7579009 + 15085456 = 2753^2 + 3884^2 .

It is a cyclic number.

It is not a de Polignac number, because 22664465 - 2⁶ = 22664401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2266442 + ... + 2266451.

It is an arithmetic number, because the mean of its divisors is an integer number (6799341).

Almost surely, 2^22664465 is an apocalyptic number.

It is an amenable number.

22664465 is a deficient number, since it is larger than the sum of its proper divisors (4532899).

22664465 is an equidigital number, since it uses as much as digits as its factorization.

22664465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4532898.

The product of its digits is 69120, while the sum is 35.

The square root of 22664465 is about 4760.7210588313. The cubic root of 22664465 is about 282.9969949778.

The spelling of 22664465 in words is "twenty-two million, six hundred sixty-four thousand, four hundred sixty-five".