66872003 has 4 divisors (see below), whose sum is σ = 72951288. Its totient is φ = 60792720.

The previous prime is 66871997. The next prime is 66872027. The reversal of 66872003 is 30027866.

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

It is a cyclic number.

It is not a de Polignac number, because 66872003 - 2⁸ = 66871747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66872093) 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, 3039626 + ... + 3039647.

It is an arithmetic number, because the mean of its divisors is an integer number (18237822).

Almost surely, 2^66872003 is an apocalyptic number.

66872003 is a deficient number, since it is larger than the sum of its proper divisors (6079285).

66872003 is a wasteful number, since it uses less digits than its factorization.

66872003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6079284.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 66872003 is about 8177.5303729182. The cubic root of 66872003 is about 405.8960053803.

Adding to 66872003 its reverse (30027866), we get a palindrome (96899869).

The spelling of 66872003 in words is "sixty-six million, eight hundred seventy-two thousand, three".