9666978 has 16 divisors (see below), whose sum is σ = 19958016. Its totient is φ = 3118320.

The previous prime is 9666941. The next prime is 9666989. The reversal of 9666978 is 8796669.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 9666978.

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, 25801 + ... + 26172.

It is an arithmetic number, because the mean of its divisors is an integer number (1247376).

Almost surely, 2^9666978 is an apocalyptic number.

9666978 is an abundant number, since it is smaller than the sum of its proper divisors (10291038).

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

9666978 is a wasteful number, since it uses less digits than its factorization.

9666978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52009.

The product of its digits is 979776, while the sum is 51.

The square root of 9666978 is about 3109.1764182819. The cubic root of 9666978 is about 213.0248378538.

The spelling of 9666978 in words is "nine million, six hundred sixty-six thousand, nine hundred seventy-eight".