9978

9978 is a natural number that follows 9977 and precedes 9979. It is an even number and a composite integer.

Its prime factorization is 9978 = 2 × 3 × 1663, with 1663 prime. Therefore 9978 is divisible by 2 and by 3, but not by any other small primes such as 5 or 7. The digit sum is 9+9+7+8 = 33, which is divisible by 3, confirming divisibility by 3.

In standard representations, 9978 is decimal; in binary it is 10011011111010; in octal it is 23372; in hexadecimal it is 26FA (0x26FA).

As a number, 9978 has no widely known special designation, but it can appear in examples involving factorization, modular arithmetic, and numeral base conversions.