664052503 has 4 divisors (see below), whose sum is σ = 664497000. Its totient is φ = 663608008.

The previous prime is 664052491. The next prime is 664052507. The reversal of 664052503 is 305250466.

664052503 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 664052503 - 2⁵ = 664052471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664052507) 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, 220000 + ... + 222997.

It is an arithmetic number, because the mean of its divisors is an integer number (166124250).

Almost surely, 2^664052503 is an apocalyptic number.

664052503 is a deficient number, since it is larger than the sum of its proper divisors (444497).

664052503 is a wasteful number, since it uses less digits than its factorization.

664052503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444496.

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

The square root of 664052503 is about 25769.2161890889. The cubic root of 664052503 is about 872.4371278412.

The spelling of 664052503 in words is "six hundred sixty-four million, fifty-two thousand, five hundred three".