9936665091949 has 2 divisors, whose sum is σ = 9936665091950. Its totient is φ = 9936665091948.

The previous prime is 9936665091931. The next prime is 9936665091967. The reversal of 9936665091949 is 9491905666399.

It is a balanced prime because it is at equal distance from previous prime (9936665091931) and next prime (9936665091967).

It can be written as a sum of positive squares in only one way, i.e., 6141688367049 + 3794976724900 = 2478243^2 + 1948070^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9936665091949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9936665091919) 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, 4968332545974 + 4968332545975.

It is an arithmetic number, because the mean of its divisors is an integer number (4968332545975).

Almost surely, 2^{9936665091949} is an apocalyptic number.

It is an amenable number.

9936665091949 is a deficient number, since it is larger than the sum of its proper divisors (1).

9936665091949 is an equidigital number, since it uses as much as digits as its factorization.

9936665091949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 765275040, while the sum is 76.

The spelling of 9936665091949 in words is "nine trillion, nine hundred thirty-six billion, six hundred sixty-five million, ninety-one thousand, nine hundred forty-nine".