22099766681 has 2 divisors, whose sum is σ = 22099766682. Its totient is φ = 22099766680.

The previous prime is 22099766657. The next prime is 22099766693. The reversal of 22099766681 is 18666799022.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20589667081 + 1510099600 = 143491^2 + 38860^2 .

It is a cyclic number.

It is not a de Polignac number, because 22099766681 - 2¹⁴ = 22099750297 is a prime.

It is a super-2 number, since 2×22099766681² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (22099763681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11049883340 + 11049883341.

It is an arithmetic number, because the mean of its divisors is an integer number (11049883341).

Almost surely, 2^22099766681 is an apocalyptic number.

It is an amenable number.

22099766681 is a deficient number, since it is larger than the sum of its proper divisors (1).

22099766681 is an equidigital number, since it uses as much as digits as its factorization.

22099766681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3919104, while the sum is 56.

The spelling of 22099766681 in words is "twenty-two billion, ninety-nine million, seven hundred sixty-six thousand, six hundred eighty-one".