66203 has 4 divisors (see below), whose sum is σ = 66720. Its totient is φ = 65688.

The previous prime is 66191. The next prime is 66221. The reversal of 66203 is 30266.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 66203 - 2¹⁰ = 65179 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 66203.

It is not an unprimeable number, because it can be changed into a prime (66293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101 + ... + 377.

It is an arithmetic number, because the mean of its divisors is an integer number (16680).

2⁶⁶²⁰³ is an apocalyptic number.

66203 is a deficient number, since it is larger than the sum of its proper divisors (517).

66203 is a wasteful number, since it uses less digits than its factorization.

66203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 66203 is about 257.2994364549. The cubic root of 66203 is about 40.4537907148.

Adding to 66203 its reverse (30266), we get a palindrome (96469).

Subtracting from 66203 its reverse (30266), we obtain a cube (35937 = 33³).

The spelling of 66203 in words is "sixty-six thousand, two hundred three".