9996330766621 has 2 divisors, whose sum is σ = 9996330766622. Its totient is φ = 9996330766620.

The previous prime is 9996330766619. The next prime is 9996330766729. The reversal of 9996330766621 is 1266670336999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8298029196900 + 1698301569721 = 2880630^2 + 1303189^2 .

It is a cyclic number.

It is not a de Polignac number, because 9996330766621 - 2¹ = 9996330766619 is a prime.

Together with 9996330766619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9996330766601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4998165383310 + 4998165383311.

It is an arithmetic number, because the mean of its divisors is an integer number (4998165383311).

Almost surely, 2^{9996330766621} is an apocalyptic number.

It is an amenable number.

9996330766621 is a deficient number, since it is larger than the sum of its proper divisors (1).

9996330766621 is an equidigital number, since it uses as much as digits as its factorization.

9996330766621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 119042784, while the sum is 67.

The spelling of 9996330766621 in words is "nine trillion, nine hundred ninety-six billion, three hundred thirty million, seven hundred sixty-six thousand, six hundred twenty-one".