22205666 has 16 divisors (see below), whose sum is σ = 38283840. Its totient is φ = 9462480.

The previous prime is 22205663. The next prime is 22205693. The reversal of 22205666 is 66650222.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22205663) 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, 1925 + ... + 6936.

It is an arithmetic number, because the mean of its divisors is an integer number (2392740).

Almost surely, 2^22205666 is an apocalyptic number.

22205666 is a deficient number, since it is larger than the sum of its proper divisors (16078174).

22205666 is a wasteful number, since it uses less digits than its factorization.

22205666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9049.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 22205666 is about 4712.2888281598. The cubic root of 22205666 is about 281.0743841275.

Adding to 22205666 its reverse (66650222), we get a palindrome (88855888).

The spelling of 22205666 in words is "twenty-two million, two hundred five thousand, six hundred sixty-six".