99664779211 has 2 divisors, whose sum is σ = 99664779212. Its totient is φ = 99664779210.

The previous prime is 99664779163. The next prime is 99664779323. The reversal of 99664779211 is 11297746699.

It is a weak prime.

It is an emirp because it is prime and its reverse (11297746699) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99664779211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99664779211.

It is not a weakly prime, because it can be changed into another prime (99664774211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49832389605 + 49832389606.

It is an arithmetic number, because the mean of its divisors is an integer number (49832389606).

Almost surely, 2^99664779211 is an apocalyptic number.

99664779211 is a deficient number, since it is larger than the sum of its proper divisors (1).

99664779211 is an equidigital number, since it uses as much as digits as its factorization.

99664779211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10287648, while the sum is 61.

The spelling of 99664779211 in words is "ninety-nine billion, six hundred sixty-four million, seven hundred seventy-nine thousand, two hundred eleven".