22705666 has 16 divisors (see below), whose sum is σ = 35364600. Its totient is φ = 10920448.

The previous prime is 22705651. The next prime is 22705667. The reversal of 22705666 is 66650722.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12006225 + 10699441 = 3465^2 + 3271^2 .

It is not an unprimeable number, because it can be changed into a prime (22705667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19920 + ... + 21028.

Almost surely, 2^22705666 is an apocalyptic number.

22705666 is a deficient number, since it is larger than the sum of its proper divisors (12658934).

22705666 is a wasteful number, since it uses less digits than its factorization.

22705666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 22705666 is about 4765.0462746966. The cubic root of 22705666 is about 283.1683748746.

The spelling of 22705666 in words is "twenty-two million, seven hundred five thousand, six hundred sixty-six".