9666591671 has 8 divisors (see below), whose sum is σ = 10548655488. Its totient is φ = 8785075000.

The previous prime is 9666591659. The next prime is 9666591673. The reversal of 9666591671 is 1761956669.

9666591671 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9666591671 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 (9666591673) 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 7 ways as a sum of consecutive naturals, for example, 99395 + ... + 170916.

It is an arithmetic number, because the mean of its divisors is an integer number (1318581936).

Almost surely, 2^9666591671 is an apocalyptic number.

9666591671 is a deficient number, since it is larger than the sum of its proper divisors (882063817).

9666591671 is a wasteful number, since it uses less digits than its factorization.

9666591671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273573.

The product of its digits is 3674160, while the sum is 56.

The square root of 9666591671 is about 98318.8266355941. The cubic root of 9666591671 is about 2130.2200005666.

The spelling of 9666591671 in words is "nine billion, six hundred sixty-six million, five hundred ninety-one thousand, six hundred seventy-one".