9663865 has 8 divisors (see below), whose sum is σ = 11615040. Its totient is φ = 7718832.

The previous prime is 9663853. The next prime is 9663869. The reversal of 9663865 is 5683669.

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 9663865 - 2⁷ = 9663737 is a prime.

It is a super-3 number, since 3×9663865³ (a number of 22 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (9663869) 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, 3346 + ... + 5524.

It is an arithmetic number, because the mean of its divisors is an integer number (1451880).

Almost surely, 2^9663865 is an apocalyptic number.

It is an amenable number.

9663865 is a deficient number, since it is larger than the sum of its proper divisors (1951175).

9663865 is a wasteful number, since it uses less digits than its factorization.

9663865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3071.

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

The square root of 9663865 is about 3108.6757630863. The cubic root of 9663865 is about 213.0019690209.

The spelling of 9663865 in words is "nine million, six hundred sixty-three thousand, eight hundred sixty-five".