9978338799 has 24 divisors (see below), whose sum is σ = 16932940752. Its totient is φ = 5582286720.

The previous prime is 9978338761. The next prime is 9978338827.

9978338799 is a `hidden beast` number, since 99 + 78 + 3 + 387 + 99 = 666.

9978338799 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 9978338799 - 2⁸ = 9978338543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9978338729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3875302 + ... + 3877875.

It is an arithmetic number, because the mean of its divisors is an integer number (705539198).

Almost surely, 2^9978338799 is an apocalyptic number.

9978338799 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

9978338799 is a deficient number, since it is larger than the sum of its proper divisors (6954601953).

9978338799 is a wasteful number, since it uses less digits than its factorization.

9978338799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7753207 (or 7753204 counting only the distinct ones).

The product of its digits is 185177664, while the sum is 72.

The square root of 9978338799 is about 99891.6352804378. The cubic root of 9978338799 is about 2152.8779773860.

The spelling of 9978338799 in words is "nine billion, nine hundred seventy-eight million, three hundred thirty-eight thousand, seven hundred ninety-nine".