22643665 has 8 divisors (see below), whose sum is σ = 29642688. Its totient is φ = 16468080.

The previous prime is 22643659. The next prime is 22643683. The reversal of 22643665 is 56634622.

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

It is not a de Polignac number, because 22643665 - 2³ = 22643657 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22643665.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205797 + ... + 205906.

It is an arithmetic number, because the mean of its divisors is an integer number (3705336).

Almost surely, 2^22643665 is an apocalyptic number.

It is an amenable number.

22643665 is a deficient number, since it is larger than the sum of its proper divisors (6999023).

22643665 is a wasteful number, since it uses less digits than its factorization.

22643665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411719.

The product of its digits is 51840, while the sum is 34.

The square root of 22643665 is about 4758.5360143641. The cubic root of 22643665 is about 282.9103962852.

It can be divided in two parts, 2264 and 3665, that added together give a square (5929 = 77²).

The spelling of 22643665 in words is "twenty-two million, six hundred forty-three thousand, six hundred sixty-five".