22661690 has 16 divisors (see below), whose sum is σ = 41104800. Its totient is φ = 8994960.

The previous prime is 22661677. The next prime is 22661707. The reversal of 22661690 is 9616622.

It is a super-2 number, since 2×22661690² = 1027104387312200, which contains 22 as substring.

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 in 7 ways as a sum of consecutive naturals, for example, 7340 + ... + 9959.

It is an arithmetic number, because the mean of its divisors is an integer number (2569050).

Almost surely, 2^22661690 is an apocalyptic number.

22661690 is a deficient number, since it is larger than the sum of its proper divisors (18443110).

22661690 is a wasteful number, since it uses less digits than its factorization.

22661690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17437.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 22661690 is about 4760.4296024624. The cubic root of 22661690 is about 282.9854446101.

It can be divided in two parts, 226 and 61690, that added together give a palindrome (61916).

The spelling of 22661690 in words is "twenty-two million, six hundred sixty-one thousand, six hundred ninety".