22666013 has 4 divisors (see below), whose sum is σ = 22839168. Its totient is φ = 22492860.

The previous prime is 22666003. The next prime is 22666019. The reversal of 22666013 is 31066622.

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 an emirpimes, since its reverse is a distinct semiprime: 31066622 = 2 ⋅15533311.

It is a cyclic number.

It is not a de Polignac number, because 22666013 - 2⁴ = 22665997 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 (22666019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86381 + ... + 86642.

It is an arithmetic number, because the mean of its divisors is an integer number (5709792).

Almost surely, 2^22666013 is an apocalyptic number.

It is an amenable number.

22666013 is a deficient number, since it is larger than the sum of its proper divisors (173155).

22666013 is a wasteful number, since it uses less digits than its factorization.

22666013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173154.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 22666013 is about 4760.8836364692. The cubic root of 22666013 is about 283.0034378003.

The spelling of 22666013 in words is "twenty-two million, six hundred sixty-six thousand, thirteen".