22445666779 has 4 divisors (see below), whose sum is σ = 22447012680. Its totient is φ = 22444320880.

The previous prime is 22445666773. The next prime is 22445666833. The reversal of 22445666779 is 97766654422.

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

It is a cyclic number.

It is not a de Polignac number, because 22445666779 - 2⁹ = 22445666267 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (22445666773) 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, 647617 + ... + 681394.

It is an arithmetic number, because the mean of its divisors is an integer number (5611753170).

Almost surely, 2^22445666779 is an apocalyptic number.

22445666779 is a deficient number, since it is larger than the sum of its proper divisors (1345901).

22445666779 is a wasteful number, since it uses less digits than its factorization.

22445666779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345900.

The product of its digits is 30481920, while the sum is 58.

The spelling of 22445666779 in words is "twenty-two billion, four hundred forty-five million, six hundred sixty-six thousand, seven hundred seventy-nine".