22731666 has 16 divisors (see below), whose sum is σ = 45914688. Its totient is φ = 7502000.

The previous prime is 22731641. The next prime is 22731673. The reversal of 22731666 is 66613722.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18150 + ... + 19361.

It is an arithmetic number, because the mean of its divisors is an integer number (2869668).

Almost surely, 2^22731666 is an apocalyptic number.

22731666 is an abundant number, since it is smaller than the sum of its proper divisors (23183022).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22731666 is a wasteful number, since it uses less digits than its factorization.

22731666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37617.

The product of its digits is 18144, while the sum is 33.

The square root of 22731666 is about 4767.7736942938. The cubic root of 22731666 is about 283.2764179410.

The spelling of 22731666 in words is "twenty-two million, seven hundred thirty-one thousand, six hundred sixty-six".