22166990 has 8 divisors (see below), whose sum is σ = 39900600. Its totient is φ = 8866792.

The previous prime is 22166983. The next prime is 22166993. The reversal of 22166990 is 9966122.

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

It is a self number, because there is not a number n which added to its sum of digits gives 22166990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22166993) 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, 1108340 + ... + 1108359.

It is an arithmetic number, because the mean of its divisors is an integer number (4987575).

Almost surely, 2^22166990 is an apocalyptic number.

22166990 is a deficient number, since it is larger than the sum of its proper divisors (17733610).

22166990 is a wasteful number, since it uses less digits than its factorization.

22166990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2216706.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 22166990 is about 4708.1833014444. The cubic root of 22166990 is about 280.9111052253.

The spelling of 22166990 in words is "twenty-two million, one hundred sixty-six thousand, nine hundred ninety".