13665016503 has 6 divisors (see below), whose sum is σ = 19738357184. Its totient is φ = 9110010996.

The previous prime is 13665016501. The next prime is 13665016507. The reversal of 13665016503 is 30561056631.

13665016503 is a `hidden beast` number, since 136 + 6 + 5 + 0 + 16 + 503 = 666.

It is not a de Polignac number, because 13665016503 - 2¹ = 13665016501 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 (13665016501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 759167575 + ... + 759167592.

Almost surely, 2^13665016503 is an apocalyptic number.

13665016503 is a deficient number, since it is larger than the sum of its proper divisors (6073340681).

13665016503 is a wasteful number, since it uses less digits than its factorization.

13665016503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1518335173 (or 1518335170 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 36.

The spelling of 13665016503 in words is "thirteen billion, six hundred sixty-five million, sixteen thousand, five hundred three".