11665366535 has 16 divisors (see below), whose sum is σ = 14399925120. Its totient is φ = 9066543360.

The previous prime is 11665366513. The next prime is 11665366541. The reversal of 11665366535 is 53566356611.

It is a happy number.

It is not a de Polignac number, because 11665366535 - 2¹² = 11665362439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11665366535.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70052 + ... + 168041.

It is an arithmetic number, because the mean of its divisors is an integer number (899995320).

Almost surely, 2^11665366535 is an apocalyptic number.

11665366535 is a deficient number, since it is larger than the sum of its proper divisors (2734558585).

11665366535 is a wasteful number, since it uses less digits than its factorization.

11665366535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238378.

The product of its digits is 1458000, while the sum is 47.

The spelling of 11665366535 in words is "eleven billion, six hundred sixty-five million, three hundred sixty-six thousand, five hundred thirty-five".