9945663 has 32 divisors (see below), whose sum is σ = 17289216. Its totient is φ = 4935168.

The previous prime is 9945647. The next prime is 9945667. The reversal of 9945663 is 3665499.

It is not a de Polignac number, because 9945663 - 2⁴ = 9945647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9945667) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3570 + ... + 5712.

It is an arithmetic number, because the mean of its divisors is an integer number (540288).

Almost surely, 2^9945663 is an apocalyptic number.

9945663 is a deficient number, since it is larger than the sum of its proper divisors (7343553).

9945663 is a wasteful number, since it uses less digits than its factorization.

9945663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2183.

The product of its digits is 174960, while the sum is 42.

The square root of 9945663 is about 3153.6745234726. The cubic root of 9945663 is about 215.0525416928.

The spelling of 9945663 in words is "nine million, nine hundred forty-five thousand, six hundred sixty-three".