66503504 has 20 divisors (see below), whose sum is σ = 132334164. Its totient is φ = 32352768.

The previous prime is 66503483. The next prime is 66503513. The reversal of 66503504 is 40530566.

It can be written as a sum of positive squares in 2 ways, for example, as 58369600 + 8133904 = 7640^2 + 2852^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55577 + ... + 56760.

Almost surely, 2^66503504 is an apocalyptic number.

It is an amenable number.

66503504 is a deficient number, since it is larger than the sum of its proper divisors (65830660).

66503504 is a wasteful number, since it uses less digits than its factorization.

66503504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112382 (or 112376 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 66503504 is about 8154.9680563445. The cubic root of 66503504 is about 405.1490667039.

The spelling of 66503504 in words is "sixty-six million, five hundred three thousand, five hundred four".