664505203 has 16 divisors (see below), whose sum is σ = 684658656. Its totient is φ = 644751360.

The previous prime is 664505173. The next prime is 664505209. The reversal of 664505203 is 302505466.

It is a cyclic number.

It is not a de Polignac number, because 664505203 - 2¹³ = 664497011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664505209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1882275 + ... + 1882627.

It is an arithmetic number, because the mean of its divisors is an integer number (42791166).

Almost surely, 2^664505203 is an apocalyptic number.

664505203 is a deficient number, since it is larger than the sum of its proper divisors (20153453).

664505203 is a wasteful number, since it uses less digits than its factorization.

664505203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 664505203 is about 25777.9984288928. The cubic root of 664505203 is about 872.6353363516.

The spelling of 664505203 in words is "six hundred sixty-four million, five hundred five thousand, two hundred three".