9663 has 4 divisors (see below), whose sum is σ = 12888. Its totient is φ = 6440.

The previous prime is 9661. The next prime is 9677. The reversal of 9663 is 3669.

9663 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3669 = 3 ⋅1223.

It is a cyclic number.

It is not a de Polignac number, because 9663 - 2¹ = 9661 is a prime.

It is an Ulam number.

It is a D-number.

9663 is a lucky number.

It is a plaindrome in base 8 and base 16.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1608 + ... + 1613.

It is an arithmetic number, because the mean of its divisors is an integer number (3222).

2⁹⁶⁶³ is an apocalyptic number.

9663 is a deficient number, since it is larger than the sum of its proper divisors (3225).

9663 is a wasteful number, since it uses less digits than its factorization.

9663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3224.

The product of its digits is 972, while the sum is 24.

The square root of 9663 is about 98.3005595101. The cubic root of 9663 is about 21.2995613655.

It can be divided in two parts, 966 and 3, that added together give a palindrome (969).

The spelling of 9663 in words is "nine thousand, six hundred sixty-three".