666038203 has 8 divisors (see below), whose sum is σ = 678153168. Its totient is φ = 654004224.

The previous prime is 666038173. The next prime is 666038213. The reversal of 666038203 is 302830666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 666038203 - 2⁵ = 666038171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666038213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3526 + ... + 36667.

It is an arithmetic number, because the mean of its divisors is an integer number (84769146).

Almost surely, 2^666038203 is an apocalyptic number.

666038203 is a deficient number, since it is larger than the sum of its proper divisors (12114965).

666038203 is a wasteful number, since it uses less digits than its factorization.

666038203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40493.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 666038203 is about 25807.7159586043. The cubic root of 666038203 is about 873.3058716413.

Adding to 666038203 its reverse (302830666), we get a palindrome (968868869).

The spelling of 666038203 in words is "six hundred sixty-six million, thirty-eight thousand, two hundred three".