663803 has 24 divisors (see below), whose sum is σ = 875520. Its totient is φ = 498960.

The previous prime is 663797. The next prime is 663821. The reversal of 663803 is 308366.

663803 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 663803 - 2⁴ = 663787 is a prime.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 7.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 663803.

It is not an unprimeable number, because it can be changed into a prime (663823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21398 + ... + 21428.

It is an arithmetic number, because the mean of its divisors is an integer number (36480).

2⁶⁶³⁸⁰³ is an apocalyptic number.

663803 is a deficient number, since it is larger than the sum of its proper divisors (211717).

663803 is a wasteful number, since it uses less digits than its factorization.

663803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87 (or 80 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 663803 is about 814.7410631606. The cubic root of 663803 is about 87.2327847853.

The spelling of 663803 in words is "six hundred sixty-three thousand, eight hundred three".