9666608868 has 108 divisors (see below), whose sum is σ = 29117929932. Its totient is φ = 2694504960.

The previous prime is 9666608839. The next prime is 9666608927. The reversal of 9666608868 is 8688066669.

It can be written as a sum of positive squares in 2 ways, for example, as 139287204 + 9527321664 = 11802^2 + 97608^2 .

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5496 + ... + 139152.

Almost surely, 2^9666608868 is an apocalyptic number.

9666608868 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9666608868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14558964966).

9666608868 is an abundant number, since it is smaller than the sum of its proper divisors (19451321064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9666608868 is a wasteful number, since it uses less digits than its factorization.

9666608868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133722 (or 133710 counting only the distinct ones).

The product of its (nonzero) digits is 35831808, while the sum is 63.

The square root of 9666608868 is about 98318.9140908299. The cubic root of 9666608868 is about 2130.2212637961.

The spelling of 9666608868 in words is "nine billion, six hundred sixty-six million, six hundred eight thousand, eight hundred sixty-eight".