22666261 has 4 divisors (see below), whose sum is σ = 22677472. Its totient is φ = 22655052.

The previous prime is 22666249. The next prime is 22666271. The reversal of 22666261 is 16266622.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 22666261 - 2⁹ = 22665749 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 (22666211) 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, 1635 + ... + 6928.

It is an arithmetic number, because the mean of its divisors is an integer number (5669368).

Almost surely, 2^22666261 is an apocalyptic number.

It is an amenable number.

22666261 is a deficient number, since it is larger than the sum of its proper divisors (11211).

22666261 is an equidigital number, since it uses as much as digits as its factorization.

22666261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11210.

The product of its digits is 10368, while the sum is 31.

The square root of 22666261 is about 4760.9096819831. The cubic root of 22666261 is about 283.0044699565.

The spelling of 22666261 in words is "twenty-two million, six hundred sixty-six thousand, two hundred sixty-one".