22766612449981 has 2 divisors, whose sum is σ = 22766612449982. Its totient is φ = 22766612449980.

The previous prime is 22766612449957. The next prime is 22766612450011. The reversal of 22766612449981 is 18994421666722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21248458256025 + 1518154193956 = 4609605^2 + 1232134^2 .

It is a cyclic number.

It is not a de Polignac number, because 22766612449981 - 2²⁵ = 22766578895549 is a prime.

It is a super-2 number, since 2×22766612449981² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22766612449181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11383306224990 + 11383306224991.

It is an arithmetic number, because the mean of its divisors is an integer number (11383306224991).

Almost surely, 2^{22766612449981} is an apocalyptic number.

It is an amenable number.

22766612449981 is a deficient number, since it is larger than the sum of its proper divisors (1).

22766612449981 is an equidigital number, since it uses as much as digits as its factorization.

22766612449981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 125411328, while the sum is 67.

The spelling of 22766612449981 in words is "twenty-two trillion, seven hundred sixty-six billion, six hundred twelve million, four hundred forty-nine thousand, nine hundred eighty-one".