22737661 has 4 divisors (see below), whose sum is σ = 23934400. Its totient is φ = 21540924.

The previous prime is 22737643. The next prime is 22737667. The reversal of 22737661 is 16673722.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22737661 - 2⁵ = 22737629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22737667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 598341 + ... + 598378.

It is an arithmetic number, because the mean of its divisors is an integer number (5983600).

Almost surely, 2^22737661 is an apocalyptic number.

It is an amenable number.

22737661 is a deficient number, since it is larger than the sum of its proper divisors (1196739).

22737661 is a wasteful number, since it uses less digits than its factorization.

22737661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196738.

The product of its digits is 21168, while the sum is 34.

The square root of 22737661 is about 4768.4023529899. The cubic root of 22737661 is about 283.3013184895.

The spelling of 22737661 in words is "twenty-two million, seven hundred thirty-seven thousand, six hundred sixty-one".