9996666 has 8 divisors (see below), whose sum is σ = 19993344. Its totient is φ = 3332220.

The previous prime is 9996659. The next prime is 9996667. The reversal of 9996666 is 6666999.

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

9996666 is an admirable number.

It is a super-2 number, since 2×9996666² = 199866662231112, which contains 22 as substring.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (9996667) by changing a digit.

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, 833050 + ... + 833061.

It is an arithmetic number, because the mean of its divisors is an integer number (2499168).

Almost surely, 2^9996666 is an apocalyptic number.

9996666 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.

9996666 is a wasteful number, since it uses less digits than its factorization.

9996666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666116.

The product of its digits is 944784, while the sum is 51.

The square root of 9996666 is about 3161.7504645370. The cubic root of 9996666 is about 215.4195233910.

The spelling of 9996666 in words is "nine million, nine hundred ninety-six thousand, six hundred sixty-six".