99691266559 has 2 divisors, whose sum is σ = 99691266560. Its totient is φ = 99691266558.

The previous prime is 99691266557. The next prime is 99691266583. The reversal of 99691266559 is 95566219699.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (95566219699) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99691266559 - 2¹ = 99691266557 is a prime.

Together with 99691266557, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 99691266494 and 99691266503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99691266557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49845633279 + 49845633280.

It is an arithmetic number, because the mean of its divisors is an integer number (49845633280).

Almost surely, 2^99691266559 is an apocalyptic number.

99691266559 is a deficient number, since it is larger than the sum of its proper divisors (1).

99691266559 is an equidigital number, since it uses as much as digits as its factorization.

99691266559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70858800, while the sum is 67.

The spelling of 99691266559 in words is "ninety-nine billion, six hundred ninety-one million, two hundred sixty-six thousand, five hundred fifty-nine".