9666901918603 has 2 divisors, whose sum is σ = 9666901918604. Its totient is φ = 9666901918602.

The previous prime is 9666901918537. The next prime is 9666901918607. The reversal of 9666901918603 is 3068191096669.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9666901918603 - 2²⁵ = 9666868364171 is a prime.

It is not a weakly prime, because it can be changed into another prime (9666901918607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4833450959301 + 4833450959302.

It is an arithmetic number, because the mean of its divisors is an integer number (4833450959302).

Almost surely, 2^{9666901918603} is an apocalyptic number.

9666901918603 is a deficient number, since it is larger than the sum of its proper divisors (1).

9666901918603 is an equidigital number, since it uses as much as digits as its factorization.

9666901918603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22674816, while the sum is 64.

The spelling of 9666901918603 in words is "nine trillion, six hundred sixty-six billion, nine hundred one million, nine hundred eighteen thousand, six hundred three".