22685666 has 4 divisors (see below), whose sum is σ = 34028502. Its totient is φ = 11342832.

The previous prime is 22685657. The next prime is 22685671. The reversal of 22685666 is 66658622.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66658622 = 2 ⋅33329311.

It can be written as a sum of positive squares in only one way, i.e., 13535041 + 9150625 = 3679^2 + 3025^2 .

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, 5671415 + ... + 5671418.

Almost surely, 2^22685666 is an apocalyptic number.

22685666 is a deficient number, since it is larger than the sum of its proper divisors (11342836).

22685666 is a wasteful number, since it uses less digits than its factorization.

22685666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11342835.

The product of its digits is 207360, while the sum is 41.

The square root of 22685666 is about 4762.9471968520. The cubic root of 22685666 is about 283.0852086853.

The spelling of 22685666 in words is "twenty-two million, six hundred eighty-five thousand, six hundred sixty-six".