9866563 has 8 divisors (see below), whose sum is σ = 11766528. Its totient is φ = 8089224.

The previous prime is 9866561. The next prime is 9866573. The reversal of 9866563 is 3656689.

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

It is a cyclic number.

It is not a de Polignac number, because 9866563 - 2¹ = 9866561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9866561) 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 7 ways as a sum of consecutive naturals, for example, 30481 + ... + 30802.

It is an arithmetic number, because the mean of its divisors is an integer number (1470816).

Almost surely, 2^9866563 is an apocalyptic number.

9866563 is a deficient number, since it is larger than the sum of its proper divisors (1899965).

9866563 is a wasteful number, since it uses less digits than its factorization.

9866563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61313.

The product of its digits is 233280, while the sum is 43.

The square root of 9866563 is about 3141.1085622754. The cubic root of 9866563 is about 214.4809038228.

The spelling of 9866563 in words is "nine million, eight hundred sixty-six thousand, five hundred sixty-three".