9640666171 has 12 divisors (see below), whose sum is σ = 9811860744. Its totient is φ = 9472226400.

The previous prime is 9640666117. The next prime is 9640666181. The reversal of 9640666171 is 1716660469.

9640666171 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9640666171 - 2¹¹ = 9640664123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9640666111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1313191 + ... + 1320511.

It is an arithmetic number, because the mean of its divisors is an integer number (817655062).

Almost surely, 2^9640666171 is an apocalyptic number.

9640666171 is a deficient number, since it is larger than the sum of its proper divisors (171194573).

9640666171 is an equidigital number, since it uses as much as digits as its factorization.

9640666171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7690 (or 7611 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 9640666171 is about 98186.8940897918. The cubic root of 9640666171 is about 2128.3139007889.

The spelling of 9640666171 in words is "nine billion, six hundred forty million, six hundred sixty-six thousand, one hundred seventy-one".