22661166 has 32 divisors (see below), whose sum is σ = 49838976. Its totient is φ = 6812000.

The previous prime is 22661147. The next prime is 22661173. The reversal of 22661166 is 66116622.

It is a nude number because it is divisible by every one of its digits.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7336 + ... + 9956.

It is an arithmetic number, because the mean of its divisors is an integer number (1557468).

Almost surely, 2^22661166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22661166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24919488).

22661166 is an abundant number, since it is smaller than the sum of its proper divisors (27177810).

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

22661166 is a wasteful number, since it uses less digits than its factorization.

22661166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2768.

The product of its digits is 5184, while the sum is 30.

The square root of 22661166 is about 4760.3745650946. The cubic root of 22661166 is about 282.9832634619.

Adding to 22661166 its reverse (66116622), we get a palindrome (88777788).

The spelling of 22661166 in words is "twenty-two million, six hundred sixty-one thousand, one hundred sixty-six".