22456661 has 4 divisors (see below), whose sum is σ = 22773024. Its totient is φ = 22140300.

The previous prime is 22456649. The next prime is 22456691. The reversal of 22456661 is 16665422.

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 22456661 - 2¹⁰ = 22455637 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22456691) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 158075 + ... + 158216.

It is an arithmetic number, because the mean of its divisors is an integer number (5693256).

Almost surely, 2^22456661 is an apocalyptic number.

It is an amenable number.

22456661 is a deficient number, since it is larger than the sum of its proper divisors (316363).

22456661 is an equidigital number, since it uses as much as digits as its factorization.

22456661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316362.

The product of its digits is 17280, while the sum is 32.

The square root of 22456661 is about 4738.8459565595. The cubic root of 22456661 is about 282.1294318911.

The spelling of 22456661 in words is "twenty-two million, four hundred fifty-six thousand, six hundred sixty-one".