665316265002503 has 4 divisors (see below), whose sum is σ = 665316389509200. Its totient is φ = 665316140495808.

The previous prime is 665316265002497. The next prime is 665316265002509. The reversal of 665316265002503 is 305200562613566.

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 (665316265002497) and next prime (665316265002509).

It is a cyclic number.

It is not a de Polignac number, because 665316265002503 - 2²⁶ = 665316197893639 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 (665316265002509) 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, 53860778 + ... + 65050871.

It is an arithmetic number, because the mean of its divisors is an integer number (166329097377300).

Almost surely, 2^{665316265002503} is an apocalyptic number.

665316265002503 is a deficient number, since it is larger than the sum of its proper divisors (124506697).

665316265002503 is a wasteful number, since it uses less digits than its factorization.

665316265002503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124506696.

The product of its (nonzero) digits is 5832000, while the sum is 50.

The spelling of 665316265002503 in words is "six hundred sixty-five trillion, three hundred sixteen billion, two hundred sixty-five million, two thousand, five hundred three".