22722166891 has 2 divisors, whose sum is σ = 22722166892. Its totient is φ = 22722166890.

The previous prime is 22722166889. The next prime is 22722166897. The reversal of 22722166891 is 19866122722.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22722166891 - 2¹ = 22722166889 is a prime.

Together with 22722166889, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22722166897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11361083445 + 11361083446.

It is an arithmetic number, because the mean of its divisors is an integer number (11361083446).

Almost surely, 2^22722166891 is an apocalyptic number.

22722166891 is a deficient number, since it is larger than the sum of its proper divisors (1).

22722166891 is an equidigital number, since it uses as much as digits as its factorization.

22722166891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 46.

The spelling of 22722166891 in words is "twenty-two billion, seven hundred twenty-two million, one hundred sixty-six thousand, eight hundred ninety-one".