22006664 has 16 divisors (see below), whose sum is σ = 41642700. Its totient is φ = 10901952.

The previous prime is 22006657. The next prime is 22006711. The reversal of 22006664 is 46660022.

It can be written as a sum of positive squares in 2 ways, for example, as 20702500 + 1304164 = 4550^2 + 1142^2 .

It is an unprimeable number.

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, 11747 + ... + 13490.

Almost surely, 2^22006664 is an apocalyptic number.

It is an amenable number.

22006664 is a deficient number, since it is larger than the sum of its proper divisors (19636036).

22006664 is a wasteful number, since it uses less digits than its factorization.

22006664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25352 (or 25348 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 22006664 is about 4691.1260908230. The cubic root of 22006664 is about 280.2322223156.

Adding to 22006664 its reverse (46660022), we get a palindrome (68666686).

The spelling of 22006664 in words is "twenty-two million, six thousand, six hundred sixty-four".