22165663 has 4 divisors (see below), whose sum is σ = 23870728. Its totient is φ = 20460600.

The previous prime is 22165643. The next prime is 22165669. The reversal of 22165663 is 36656122.

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

It is a cyclic number.

It is not a de Polignac number, because 22165663 - 2⁹ = 22165151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22165669) 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 3 ways as a sum of consecutive naturals, for example, 852513 + ... + 852538.

It is an arithmetic number, because the mean of its divisors is an integer number (5967682).

Almost surely, 2^22165663 is an apocalyptic number.

22165663 is a deficient number, since it is larger than the sum of its proper divisors (1705065).

22165663 is a wasteful number, since it uses less digits than its factorization.

22165663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1705064.

The product of its digits is 12960, while the sum is 31.

The square root of 22165663 is about 4708.0423744907. The cubic root of 22165663 is about 280.9054996458.

The spelling of 22165663 in words is "twenty-two million, one hundred sixty-five thousand, six hundred sixty-three".