22666861 has 6 divisors (see below), whose sum is σ = 26367630. Its totient is φ = 19428696.

The previous prime is 22666849. The next prime is 22666871. The reversal of 22666861 is 16866622.

It can be written as a sum of positive squares in only one way, i.e., 21996100 + 670761 = 4690^2 + 819^2 .

It is not a de Polignac number, because 22666861 - 2⁷ = 22666733 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22666861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22666801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 231246 + ... + 231343.

It is an arithmetic number, because the mean of its divisors is an integer number (4394605).

Almost surely, 2^22666861 is an apocalyptic number.

It is an amenable number.

22666861 is a deficient number, since it is larger than the sum of its proper divisors (3700769).

22666861 is an equidigital number, since it uses as much as digits as its factorization.

22666861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462603 (or 462596 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

The square root of 22666861 is about 4760.9726947337. The cubic root of 22666861 is about 283.0069670774.

The spelling of 22666861 in words is "twenty-two million, six hundred sixty-six thousand, eight hundred sixty-one".