22066620809 has 4 divisors (see below), whose sum is σ = 22663016004. Its totient is φ = 21470225616.

The previous prime is 22066620799. The next prime is 22066620817. The reversal of 22066620809 is 90802666022.

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 19803525625 + 2263095184 = 140725^2 + 47572^2 .

It is not a de Polignac number, because 22066620809 - 2⁸ = 22066620553 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22066670809) 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, 298197542 + ... + 298197615.

It is an arithmetic number, because the mean of its divisors is an integer number (5665754001).

Almost surely, 2^22066620809 is an apocalyptic number.

It is an amenable number.

22066620809 is a deficient number, since it is larger than the sum of its proper divisors (596395195).

22066620809 is an equidigital number, since it uses as much as digits as its factorization.

22066620809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596395194.

The product of its (nonzero) digits is 124416, while the sum is 41.

The spelling of 22066620809 in words is "twenty-two billion, sixty-six million, six hundred twenty thousand, eight hundred nine".