665340014503 has 4 divisors (see below), whose sum is σ = 686802595648. Its totient is φ = 643877433360.

The previous prime is 665340014477. The next prime is 665340014513. The reversal of 665340014503 is 305410043566.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 305410043566 = 2 ⋅152705021783.

It is a cyclic number.

It is not a de Polignac number, because 665340014503 - 2³³ = 656750079911 is a prime.

It is a super-4 number, since 4×665340014503⁴ (a number of 48 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665340014513) 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, 10731290526 + ... + 10731290587.

It is an arithmetic number, because the mean of its divisors is an integer number (171700648912).

Almost surely, 2^665340014503 is an apocalyptic number.

665340014503 is a deficient number, since it is larger than the sum of its proper divisors (21462581145).

665340014503 is a wasteful number, since it uses less digits than its factorization.

665340014503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21462581144.

The product of its (nonzero) digits is 129600, while the sum is 37.

The spelling of 665340014503 in words is "six hundred sixty-five billion, three hundred forty million, fourteen thousand, five hundred three".