22666788 has 36 divisors (see below), whose sum is σ = 57455580. Its totient is φ = 7534656.

The previous prime is 22666781. The next prime is 22666789. The reversal of 22666788 is 88766622.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17791524 + 4875264 = 4218^2 + 2208^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (22666781) 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 11 ways as a sum of consecutive naturals, for example, 17706 + ... + 18942.

Almost surely, 2^22666788 is an apocalyptic number.

It is an amenable number.

22666788 is an abundant number, since it is smaller than the sum of its proper divisors (34788792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22666788 is a wasteful number, since it uses less digits than its factorization.

22666788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1756 (or 1751 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 22666788 is about 4760.9650282269. The cubic root of 22666788 is about 283.0066632634.

The spelling of 22666788 in words is "twenty-two million, six hundred sixty-six thousand, seven hundred eighty-eight".