22666618573 has 4 divisors (see below), whose sum is σ = 23448226140. Its totient is φ = 21885011008.

The previous prime is 22666618549. The next prime is 22666618591. The reversal of 22666618573 is 37581666622.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9432877129 + 13233741444 = 97123^2 + 115038^2 .

It is a de Polignac number, because none of the positive numbers 2^k-22666618573 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22666618573.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22666618673) 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, 390803740 + ... + 390803797.

It is an arithmetic number, because the mean of its divisors is an integer number (5862056535).

Almost surely, 2^22666618573 is an apocalyptic number.

It is an amenable number.

22666618573 is a deficient number, since it is larger than the sum of its proper divisors (781607567).

22666618573 is an equidigital number, since it uses as much as digits as its factorization.

22666618573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781607566.

The product of its digits is 4354560, while the sum is 52.

The spelling of 22666618573 in words is "twenty-two billion, six hundred sixty-six million, six hundred eighteen thousand, five hundred seventy-three".