22566065 has 4 divisors (see below), whose sum is σ = 27079284. Its totient is φ = 18052848.

The previous prime is 22566043. The next prime is 22566067. The reversal of 22566065 is 56066522.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17372224 + 5193841 = 4168^2 + 2279^2 .

It is a cyclic number.

It is not a de Polignac number, because 22566065 - 2¹⁰ = 22565041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22566067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2256602 + ... + 2256611.

It is an arithmetic number, because the mean of its divisors is an integer number (6769821).

Almost surely, 2^22566065 is an apocalyptic number.

It is an amenable number.

22566065 is a deficient number, since it is larger than the sum of its proper divisors (4513219).

22566065 is an equidigital number, since it uses as much as digits as its factorization.

22566065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4513218.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 22566065 is about 4750.3752483357. The cubic root of 22566065 is about 282.5868477596.

The spelling of 22566065 in words is "twenty-two million, five hundred sixty-six thousand, sixty-five".