9666808947 has 16 divisors (see below), whose sum is σ = 14328616960. Its totient is φ = 6441201000.

The previous prime is 9666808919. The next prime is 9666808981. The reversal of 9666808947 is 7498086669.

It is not a de Polignac number, because 9666808947 - 2²⁶ = 9599700083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9666803947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39079 + ... + 144432.

It is an arithmetic number, because the mean of its divisors is an integer number (895538560).

Almost surely, 2^9666808947 is an apocalyptic number.

9666808947 is a deficient number, since it is larger than the sum of its proper divisors (4661808013).

9666808947 is a wasteful number, since it uses less digits than its factorization.

9666808947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185471 (or 185465 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 63.

The square root of 9666808947 is about 98319.9315856149. The cubic root of 9666808947 is about 2130.2359607667.

The spelling of 9666808947 in words is "nine billion, six hundred sixty-six million, eight hundred eight thousand, nine hundred forty-seven".