664247203 has 4 divisors (see below), whose sum is σ = 667026720. Its totient is φ = 661467688.

The previous prime is 664247197. The next prime is 664247209. The reversal of 664247203 is 302742466.

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 (664247197) and next prime (664247209).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664247203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664247209) 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, 1389400 + ... + 1389877.

It is an arithmetic number, because the mean of its divisors is an integer number (166756680).

Almost surely, 2^664247203 is an apocalyptic number.

664247203 is a deficient number, since it is larger than the sum of its proper divisors (2779517).

664247203 is a wasteful number, since it uses less digits than its factorization.

664247203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2779516.

The product of its (nonzero) digits is 48384, while the sum is 34.

The square root of 664247203 is about 25772.9936755512. The cubic root of 664247203 is about 872.5223856130.

Adding to 664247203 its reverse (302742466), we get a palindrome (966989669).

The spelling of 664247203 in words is "six hundred sixty-four million, two hundred forty-seven thousand, two hundred three".