9966578 has 8 divisors (see below), whose sum is σ = 15057840. Its totient is φ = 4947300.

The previous prime is 9966577. The next prime is 9966581. The reversal of 9966578 is 8756699.

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 (9966577) 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, 17648 + ... + 18203.

It is an arithmetic number, because the mean of its divisors is an integer number (1882230).

Almost surely, 2^9966578 is an apocalyptic number.

9966578 is a deficient number, since it is larger than the sum of its proper divisors (5091262).

9966578 is a wasteful number, since it uses less digits than its factorization.

9966578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35992.

The product of its digits is 816480, while the sum is 50.

The square root of 9966578 is about 3156.9887551273. The cubic root of 9966578 is about 215.2031827217.

The spelling of 9966578 in words is "nine million, nine hundred sixty-six thousand, five hundred seventy-eight".