9967866 has 8 divisors (see below), whose sum is σ = 19935744. Its totient is φ = 3322620.

The previous prime is 9967823. The next prime is 9967883. The reversal of 9967866 is 6687699.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

9967866 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 830650 + ... + 830661.

It is an arithmetic number, because the mean of its divisors is an integer number (2491968).

Almost surely, 2^9967866 is an apocalyptic number.

9967866 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

9967866 is a wasteful number, since it uses less digits than its factorization.

9967866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1661316.

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

The square root of 9967866 is about 3157.1927403945. The cubic root of 9967866 is about 215.2124526958.

The spelling of 9967866 in words is "nine million, nine hundred sixty-seven thousand, eight hundred sixty-six".