9978668 has 24 divisors (see below), whose sum is σ = 20647200. Its totient is φ = 4128768.

The previous prime is 9978659. The next prime is 9978719. The reversal of 9978668 is 8668799.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5333 + ... + 6956.

It is an arithmetic number, because the mean of its divisors is an integer number (860300).

Almost surely, 2^9978668 is an apocalyptic number.

It is an amenable number.

9978668 is an abundant number, since it is smaller than the sum of its proper divisors (10668532).

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

9978668 is a wasteful number, since it uses less digits than its factorization.

9978668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12329 (or 12327 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 53.

The square root of 9978668 is about 3158.9029741352. The cubic root of 9978668 is about 215.2901652729.

The spelling of 9978668 in words is "nine million, nine hundred seventy-eight thousand, six hundred sixty-eight".