9965380663 has 16 divisors (see below), whose sum is σ = 11588808960. Its totient is φ = 8392072896.

The previous prime is 9965380619. The next prime is 9965380679. The reversal of 9965380663 is 3660835699.

It is a cyclic number.

It is not a de Polignac number, because 9965380663 - 2⁹ = 9965380151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9965380613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 817056 + ... + 829162.

It is an arithmetic number, because the mean of its divisors is an integer number (724300560).

Almost surely, 2^9965380663 is an apocalyptic number.

9965380663 is a deficient number, since it is larger than the sum of its proper divisors (1623428297).

9965380663 is a wasteful number, since it uses less digits than its factorization.

9965380663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14166.

The product of its (nonzero) digits is 6298560, while the sum is 55.

The square root of 9965380663 is about 99826.7532428056. The cubic root of 9965380663 is about 2151.9456454967.

The spelling of 9965380663 in words is "nine billion, nine hundred sixty-five million, three hundred eighty thousand, six hundred sixty-three".