9966968171 has 4 divisors (see below), whose sum is σ = 9967629672. Its totient is φ = 9966306672.

The previous prime is 9966968161. The next prime is 9966968177. The reversal of 9966968171 is 1718696699.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9966968171 - 2²² = 9962773867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9966968177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 307610 + ... + 338463.

It is an arithmetic number, because the mean of its divisors is an integer number (2491907418).

Almost surely, 2^9966968171 is an apocalyptic number.

9966968171 is a deficient number, since it is larger than the sum of its proper divisors (661501).

9966968171 is a wasteful number, since it uses less digits than its factorization.

9966968171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661500.

The product of its digits is 8817984, while the sum is 62.

The square root of 9966968171 is about 99834.7042415612. The cubic root of 9966968171 is about 2152.0599093887.

The spelling of 9966968171 in words is "nine billion, nine hundred sixty-six million, nine hundred sixty-eight thousand, one hundred seventy-one".