9865663 has 8 divisors (see below), whose sum is σ = 10060416. Its totient is φ = 9672600.

The previous prime is 9865651. The next prime is 9865711. The reversal of 9865663 is 3665689.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9865663 is a prime.

9865663 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9865613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19848 + ... + 20338.

It is an arithmetic number, because the mean of its divisors is an integer number (1257552).

Almost surely, 2^9865663 is an apocalyptic number.

9865663 is a deficient number, since it is larger than the sum of its proper divisors (194753).

9865663 is a wasteful number, since it uses less digits than its factorization.

9865663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845.

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

The square root of 9865663 is about 3140.9652974842. The cubic root of 9865663 is about 214.4743821772.

The spelling of 9865663 in words is "nine million, eight hundred sixty-five thousand, six hundred sixty-three".