9666678 has 64 divisors (see below), whose sum is σ = 23224320. Its totient is φ = 2625312.

The previous prime is 9666661. The next prime is 9666689. The reversal of 9666678 is 8766669.

It is a happy number.

It is a super-3 number, since 3×9666678³ (a number of 22 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116425 + ... + 116507.

It is an arithmetic number, because the mean of its divisors is an integer number (362880).

Almost surely, 2^9666678 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9666678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11612160).

9666678 is an abundant number, since it is smaller than the sum of its proper divisors (13557642).

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

9666678 is a wasteful number, since it uses less digits than its factorization.

9666678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201.

The product of its digits is 653184, while the sum is 48.

The square root of 9666678 is about 3109.1281736204. The cubic root of 9666678 is about 213.0226341968.

Subtracting from 9666678 its reverse (8766669), we obtain a palindrome (900009).

The spelling of 9666678 in words is "nine million, six hundred sixty-six thousand, six hundred seventy-eight".