22666865 has 32 divisors (see below), whose sum is σ = 31552416. Its totient is φ = 15482880.

The previous prime is 22666849. The next prime is 22666871. The reversal of 22666865 is 56866622.

It can be written as a sum of positive squares in 16 ways, for example, as 3236401 + 19430464 = 1799^2 + 4408^2 .

It is not a de Polignac number, because 22666865 - 2⁴ = 22666849 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 31 ways as a sum of consecutive naturals, for example, 80525 + ... + 80805.

It is an arithmetic number, because the mean of its divisors is an integer number (986013).

Almost surely, 2^22666865 is an apocalyptic number.

It is an amenable number.

22666865 is a deficient number, since it is larger than the sum of its proper divisors (8885551).

22666865 is a wasteful number, since it uses less digits than its factorization.

22666865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389.

The product of its digits is 207360, while the sum is 41.

The square root of 22666865 is about 4760.9731148159. The cubic root of 22666865 is about 283.0069837247.

The spelling of 22666865 in words is "twenty-two million, six hundred sixty-six thousand, eight hundred sixty-five".