9966986 has 12 divisors (see below), whose sum is σ = 15396498. Its totient is φ = 4835592.

The previous prime is 9966967. The next prime is 9966989. The reversal of 9966986 is 6896699.

It can be written as a sum of positive squares in only one way, i.e., 6599761 + 3367225 = 2569^2 + 1835^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9966989) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26975 + ... + 27341.

Almost surely, 2^9966986 is an apocalyptic number.

9966986 is a deficient number, since it is larger than the sum of its proper divisors (5429512).

9966986 is an equidigital number, since it uses as much as digits as its factorization.

9966986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773 (or 406 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 53.

The square root of 9966986 is about 3157.0533730046. The cubic root of 9966986 is about 215.2061192596.

The spelling of 9966986 in words is "nine million, nine hundred sixty-six thousand, nine hundred eighty-six".