22165666 has 24 divisors (see below), whose sum is σ = 35976240. Its totient is φ = 10213920.

The previous prime is 22165643. The next prime is 22165669. The reversal of 22165666 is 66656122.

It is not an unprimeable number, because it can be changed into a prime (22165669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63705 + ... + 64051.

It is an arithmetic number, because the mean of its divisors is an integer number (1499010).

Almost surely, 2^22165666 is an apocalyptic number.

22165666 is a deficient number, since it is larger than the sum of its proper divisors (13810574).

22165666 is a wasteful number, since it uses less digits than its factorization.

22165666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450 (or 409 counting only the distinct ones).

The product of its digits is 25920, while the sum is 34.

The square root of 22165666 is about 4708.0426930944. The cubic root of 22165666 is about 280.9055123188.

The spelling of 22165666 in words is "twenty-two million, one hundred sixty-five thousand, six hundred sixty-six".