66316003 has 4 divisors (see below), whose sum is σ = 71417248. Its totient is φ = 61214760.

The previous prime is 66315973. The next prime is 66316021. The reversal of 66316003 is 30061366.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66316003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66316073) 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, 2550603 + ... + 2550628.

It is an arithmetic number, because the mean of its divisors is an integer number (17854312).

Almost surely, 2^66316003 is an apocalyptic number.

66316003 is a deficient number, since it is larger than the sum of its proper divisors (5101245).

66316003 is a wasteful number, since it uses less digits than its factorization.

66316003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5101244.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 66316003 is about 8143.4638207583. The cubic root of 66316003 is about 404.7679471352.

Adding to 66316003 its reverse (30061366), we get a palindrome (96377369).

The spelling of 66316003 in words is "sixty-six million, three hundred sixteen thousand, three".