22666688 has 42 divisors (see below), whose sum is σ = 49456848. Its totient is φ = 10299520.

The previous prime is 22666687. The next prime is 22666691. The reversal of 22666688 is 88666622.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22666687) 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 5 ways as a sum of consecutive naturals, for example, 6281 + ... + 9207.

It is an arithmetic number, because the mean of its divisors is an integer number (1177544).

Almost surely, 2^22666688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22666688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24728424).

22666688 is an abundant number, since it is smaller than the sum of its proper divisors (26790160).

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

22666688 is a wasteful number, since it uses less digits than its factorization.

22666688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2961 (or 2940 counting only the distinct ones).

The product of its digits is 331776, while the sum is 44.

The square root of 22666688 is about 4760.9545261428. The cubic root of 22666688 is about 283.0062470787.

The spelling of 22666688 in words is "twenty-two million, six hundred sixty-six thousand, six hundred eighty-eight".