22165665 has 8 divisors (see below), whose sum is σ = 35465088. Its totient is φ = 11821680.

The previous prime is 22165643. The next prime is 22165669. The reversal of 22165665 is 56656122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22165665 - 2⁶ = 22165601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22165669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 738841 + ... + 738870.

It is an arithmetic number, because the mean of its divisors is an integer number (4433136).

Almost surely, 2^22165665 is an apocalyptic number.

It is an amenable number.

22165665 is a deficient number, since it is larger than the sum of its proper divisors (13299423).

22165665 is a wasteful number, since it uses less digits than its factorization.

22165665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1477719.

The product of its digits is 21600, while the sum is 33.

The square root of 22165665 is about 4708.0425868932. The cubic root of 22165665 is about 280.9055080944.

The spelling of 22165665 in words is "twenty-two million, one hundred sixty-five thousand, six hundred sixty-five".