65506503 has 16 divisors (see below), whose sum is σ = 91513856. Its totient is φ = 41627520.

The previous prime is 65506499. The next prime is 65506513. The reversal of 65506503 is 30560556.

It is not a de Polignac number, because 65506503 - 2² = 65506499 is a prime.

It is a super-2 number, since 2×65506503² = 8582203870578018, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65506513) 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, 975 + ... + 11487.

It is an arithmetic number, because the mean of its divisors is an integer number (5719616).

Almost surely, 2^65506503 is an apocalyptic number.

65506503 is a deficient number, since it is larger than the sum of its proper divisors (26007353).

65506503 is a wasteful number, since it uses less digits than its factorization.

65506503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10614.

The product of its (nonzero) digits is 13500, while the sum is 30.

The square root of 65506503 is about 8093.6087748297. The cubic root of 65506503 is about 403.1142387849.

The spelling of 65506503 in words is "sixty-five million, five hundred six thousand, five hundred three".