66803 has 4 divisors (see below), whose sum is σ = 72888. Its totient is φ = 60720.

The previous prime is 66797. The next prime is 66809. The reversal of 66803 is 30866.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (66797) and next prime (66809).

It is not a de Polignac number, because 66803 - 2⁶ = 66739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66809) 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, 3026 + ... + 3047.

It is an arithmetic number, because the mean of its divisors is an integer number (18222).

2⁶⁶⁸⁰³ is an apocalyptic number.

66803 is a deficient number, since it is larger than the sum of its proper divisors (6085).

66803 is a wasteful number, since it uses less digits than its factorization.

66803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6084.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 66803 is about 258.4627632755. The cubic root of 66803 is about 40.5756347128.

Subtracting from 66803 its reverse (30866), we obtain a cube (35937 = 33³).

The spelling of 66803 in words is "sixty-six thousand, eight hundred three".