9666344209 has 8 divisors (see below), whose sum is σ = 9920624040. Its totient is φ = 9414727296.

The previous prime is 9666344179. The next prime is 9666344263. The reversal of 9666344209 is 9024436669.

It can be written as a sum of positive squares in 4 ways, for example, as 1030731025 + 8635613184 = 32105^2 + 92928^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 9666344209 - 2⁹ = 9666343697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9666342209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 658374 + ... + 672895.

It is an arithmetic number, because the mean of its divisors is an integer number (1240078005).

Almost surely, 2^9666344209 is an apocalyptic number.

It is an amenable number.

9666344209 is a deficient number, since it is larger than the sum of its proper divisors (254279831).

9666344209 is a wasteful number, since it uses less digits than its factorization.

9666344209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331459.

The product of its (nonzero) digits is 1679616, while the sum is 49.

The square root of 9666344209 is about 98317.5681605276. The cubic root of 9666344209 is about 2130.2018227359.

The spelling of 9666344209 in words is "nine billion, six hundred sixty-six million, three hundred forty-four thousand, two hundred nine".