22144666 has 4 divisors (see below), whose sum is σ = 33217002. Its totient is φ = 11072332.

The previous prime is 22144657. The next prime is 22144679. The reversal of 22144666 is 66644122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66644122 = 2 ⋅33322061.

It can be written as a sum of positive squares in only one way, i.e., 14220441 + 7924225 = 3771^2 + 2815^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5536165 + ... + 5536168.

Almost surely, 2^22144666 is an apocalyptic number.

22144666 is a deficient number, since it is larger than the sum of its proper divisors (11072336).

22144666 is a wasteful number, since it uses less digits than its factorization.

22144666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11072335.

The product of its digits is 13824, while the sum is 31.

The square root of 22144666 is about 4705.8119384438. The cubic root of 22144666 is about 280.8167732802.

Adding to 22144666 its reverse (66644122), we get a palindrome (88788788).

The spelling of 22144666 in words is "twenty-two million, one hundred forty-four thousand, six hundred sixty-six".