22166785 has 16 divisors (see below), whose sum is σ = 27205200. Its totient is φ = 17335296.

The previous prime is 22166741. The next prime is 22166789. The reversal of 22166785 is 58766122.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 104976 + 22061809 = 324^2 + 4697^2 .

It is a cyclic number.

It is not a de Polignac number, because 22166785 - 2²¹ = 20069633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22166789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48277 + ... + 48733.

It is an arithmetic number, because the mean of its divisors is an integer number (1700325).

Almost surely, 2^22166785 is an apocalyptic number.

It is an amenable number.

22166785 is a deficient number, since it is larger than the sum of its proper divisors (5038415).

22166785 is a wasteful number, since it uses less digits than its factorization.

22166785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660.

The product of its digits is 40320, while the sum is 37.

The square root of 22166785 is about 4708.1615307888. The cubic root of 22166785 is about 280.9102392687.

The spelling of 22166785 in words is "twenty-two million, one hundred sixty-six thousand, seven hundred eighty-five".