9928666 has 8 divisors (see below), whose sum is σ = 16246944. Its totient is φ = 4513020.

The previous prime is 9928661. The next prime is 9928669. The reversal of 9928666 is 6668299.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (9928661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225630 + ... + 225673.

It is an arithmetic number, because the mean of its divisors is an integer number (2030868).

Almost surely, 2^9928666 is an apocalyptic number.

9928666 is a deficient number, since it is larger than the sum of its proper divisors (6318278).

9928666 is a wasteful number, since it uses less digits than its factorization.

9928666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451316.

The product of its digits is 279936, while the sum is 46.

The square root of 9928666 is about 3150.9785781563. The cubic root of 9928666 is about 214.9299645693.

The spelling of 9928666 in words is "nine million, nine hundred twenty-eight thousand, six hundred sixty-six".