22556666 has 8 divisors (see below), whose sum is σ = 36910944. Its totient is φ = 10253020.

The previous prime is 22556659. The next prime is 22556669. The reversal of 22556666 is 66665522.

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

It is a Curzon number.

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (22556669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 512630 + ... + 512673.

It is an arithmetic number, because the mean of its divisors is an integer number (4613868).

Almost surely, 2^22556666 is an apocalyptic number.

22556666 is a deficient number, since it is larger than the sum of its proper divisors (14354278).

22556666 is a wasteful number, since it uses less digits than its factorization.

22556666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025316.

The product of its digits is 129600, while the sum is 38.

The square root of 22556666 is about 4749.3858550343. The cubic root of 22556666 is about 282.5476088608.

The spelling of 22556666 in words is "twenty-two million, five hundred fifty-six thousand, six hundred sixty-six".