9988668899 has 4 divisors (see below), whose sum is σ = 10896729720. Its totient is φ = 9080608080.

The previous prime is 9988668887. The next prime is 9988668901.

9988668899 is nontrivially palindromic in base 10.

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 9988668899 - 2⁴ = 9988668883 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (9988668839) 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, 454030394 + ... + 454030415.

It is an arithmetic number, because the mean of its divisors is an integer number (2724182430).

Almost surely, 2^9988668899 is an apocalyptic number.

9988668899 is a deficient number, since it is larger than the sum of its proper divisors (908060821).

9988668899 is a wasteful number, since it uses less digits than its factorization.

9988668899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908060820.

The product of its digits is 967458816, while the sum is 80.

The square root of 9988668899 is about 99943.3284366695. The cubic root of 9988668899 is about 2153.6206452513.

The spelling of 9988668899 in words is "nine billion, nine hundred eighty-eight million, six hundred sixty-eight thousand, eight hundred ninety-nine".