22678866 has 60 divisors (see below), whose sum is σ = 59134878. Its totient is φ = 6477408.

The previous prime is 22678861. The next prime is 22678871. The reversal of 22678866 is 66887622.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22678861) and next prime (22678871).

It can be written as a sum of positive squares in only one way, i.e., 17816841 + 4862025 = 4221^2 + 2205^2 .

It is not an unprimeable number, because it can be changed into a prime (22678861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 6510 + ... + 9366.

Almost surely, 2^22678866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22678866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29567439).

22678866 is an abundant number, since it is smaller than the sum of its proper divisors (36456012).

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

22678866 is a wasteful number, since it uses less digits than its factorization.

22678866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2885 (or 2869 counting only the distinct ones).

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

The square root of 22678866 is about 4762.2332996190. The cubic root of 22678866 is about 283.0569210464.

The spelling of 22678866 in words is "twenty-two million, six hundred seventy-eight thousand, eight hundred sixty-six".