99668827481 has 2 divisors, whose sum is σ = 99668827482. Its totient is φ = 99668827480.

The previous prime is 99668827439. The next prime is 99668827507. The reversal of 99668827481 is 18472886699.

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., 74465677456 + 25203150025 = 272884^2 + 158755^2 .

It is an emirp because it is prime and its reverse (18472886699) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99668827481 - 2¹⁰ = 99668826457 is a prime.

It is a super-2 number, since 2×99668827481² (a number of 23 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 (99668827781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49834413740 + 49834413741.

It is an arithmetic number, because the mean of its divisors is an integer number (49834413741).

Almost surely, 2^99668827481 is an apocalyptic number.

It is an amenable number.

99668827481 is a deficient number, since it is larger than the sum of its proper divisors (1).

99668827481 is an equidigital number, since it uses as much as digits as its factorization.

99668827481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 83607552, while the sum is 68.

The spelling of 99668827481 in words is "ninety-nine billion, six hundred sixty-eight million, eight hundred twenty-seven thousand, four hundred eighty-one".