22666660 has 12 divisors (see below), whose sum is σ = 47600028. Its totient is φ = 9066656.

The previous prime is 22666621. The next prime is 22666663. The reversal of 22666660 is 6666622.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17106496 + 5560164 = 4136^2 + 2358^2 .

It is not an unprimeable number, because it can be changed into a prime (22666663) 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, 566647 + ... + 566686.

It is an arithmetic number, because the mean of its divisors is an integer number (3966669).

Almost surely, 2^22666660 is an apocalyptic number.

22666660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22666660 is an abundant number, since it is smaller than the sum of its proper divisors (24933368).

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

22666660 is a wasteful number, since it uses less digits than its factorization.

22666660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133342 (or 1133340 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 22666660 is about 4760.9515855551. The cubic root of 22666660 is about 283.0061305468.

It can be divided in two parts, 2 and 2666660, that added together give a palindrome (2666662).

The spelling of 22666660 in words is "twenty-two million, six hundred sixty-six thousand, six hundred sixty".