11665665024543 has 24 divisors (see below), whose sum is σ = 17841734715168. Its totient is φ = 7319579876352.

The previous prime is 11665665024521. The next prime is 11665665024551. The reversal of 11665665024543 is 34542056656611.

11665665024543 is a `hidden beast` number, since 1 + 1 + 6 + 6 + 56 + 6 + 502 + 45 + 43 = 666.

It is not a de Polignac number, because 11665665024543 - 2¹⁷ = 11665664893471 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11665665024543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11665665024043) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40078230 + ... + 40368252.

It is an arithmetic number, because the mean of its divisors is an integer number (743405613132).

Almost surely, 2^{11665665024543} is an apocalyptic number.

11665665024543 is a deficient number, since it is larger than the sum of its proper divisors (6176069690625).

11665665024543 is a wasteful number, since it uses less digits than its factorization.

11665665024543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552943 (or 552940 counting only the distinct ones).

The product of its (nonzero) digits is 15552000, while the sum is 54.

The spelling of 11665665024543 in words is "eleven trillion, six hundred sixty-five billion, six hundred sixty-five million, twenty-four thousand, five hundred forty-three".