99966651372641 has 2 divisors, whose sum is σ = 99966651372642. Its totient is φ = 99966651372640.

The previous prime is 99966651372551. The next prime is 99966651372737. The reversal of 99966651372641 is 14627315666999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62873861924416 + 37092789448225 = 7929304^2 + 6090385^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99966651372641 is a prime.

It is not a weakly prime, because it can be changed into another prime (99966651371641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49983325686320 + 49983325686321.

It is an arithmetic number, because the mean of its divisors is an integer number (49983325686321).

Almost surely, 2^{99966651372641} is an apocalyptic number.

It is an amenable number.

99966651372641 is a deficient number, since it is larger than the sum of its proper divisors (1).

99966651372641 is an equidigital number, since it uses as much as digits as its factorization.

99966651372641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 793618560, while the sum is 74.

The spelling of 99966651372641 in words is "ninety-nine trillion, nine hundred sixty-six billion, six hundred fifty-one million, three hundred seventy-two thousand, six hundred forty-one".