9966587 has 2 divisors, whose sum is σ = 9966588. Its totient is φ = 9966586.

The previous prime is 9966581. The next prime is 9966599. The reversal of 9966587 is 7856699.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9966587 - 2⁸ = 9966331 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9966581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4983293 + 4983294.

It is an arithmetic number, because the mean of its divisors is an integer number (4983294).

Almost surely, 2^9966587 is an apocalyptic number.

9966587 is a deficient number, since it is larger than the sum of its proper divisors (1).

9966587 is an equidigital number, since it uses as much as digits as its factorization.

9966587 is an odious number, because the sum of its binary digits is odd.

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

The square root of 9966587 is about 3156.9901805359. The cubic root of 9966587 is about 215.2032474992.

The spelling of 9966587 in words is "nine million, nine hundred sixty-six thousand, five hundred eighty-seven".