13065537665 has 16 divisors (see below), whose sum is σ = 16433722368. Its totient is φ = 9953123136.

The previous prime is 13065537607. The next prime is 13065537689. The reversal of 13065537665 is 56673556031.

It is a cyclic number.

It is not a de Polignac number, because 13065537665 - 2¹⁶ = 13065472129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 229094 + ... + 280383.

It is an arithmetic number, because the mean of its divisors is an integer number (1027107648).

Almost surely, 2^13065537665 is an apocalyptic number.

It is an amenable number.

13065537665 is a deficient number, since it is larger than the sum of its proper divisors (3368184703).

13065537665 is a wasteful number, since it uses less digits than its factorization.

13065537665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509728.

The product of its (nonzero) digits is 1701000, while the sum is 47.

The spelling of 13065537665 in words is "thirteen billion, sixty-five million, five hundred thirty-seven thousand, six hundred sixty-five".