22188666 has 8 divisors (see below), whose sum is σ = 44377344. Its totient is φ = 7396220.

The previous prime is 22188623. The next prime is 22188671. The reversal of 22188666 is 66688122.

It is a sphenic number, since it is the product of 3 distinct primes.

22188666 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1849050 + ... + 1849061.

It is an arithmetic number, because the mean of its divisors is an integer number (5547168).

Almost surely, 2^22188666 is an apocalyptic number.

22188666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

22188666 is a wasteful number, since it uses less digits than its factorization.

22188666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3698116.

The product of its digits is 55296, while the sum is 39.

The square root of 22188666 is about 4710.4846884371. The cubic root of 22188666 is about 281.0026384085.

The spelling of 22188666 in words is "twenty-two million, one hundred eighty-eight thousand, six hundred sixty-six".