11666043518255 has 16 divisors (see below), whose sum is σ = 16940271597120. Its totient is φ = 7529009597952.

The previous prime is 11666043518201. The next prime is 11666043518257. The reversal of 11666043518255 is 55281534066611.

It is a cyclic number.

It is not a de Polignac number, because 11666043518255 - 2⁶ = 11666043518191 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11666043518197 and 11666043518206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11666043518257) 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 15 ways as a sum of consecutive naturals, for example, 9803397320 + ... + 9803398509.

It is an arithmetic number, because the mean of its divisors is an integer number (1058766974820).

Almost surely, 2^{11666043518255} is an apocalyptic number.

11666043518255 is a deficient number, since it is larger than the sum of its proper divisors (5274228078865).

11666043518255 is a wasteful number, since it uses less digits than its factorization.

11666043518255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19606795858.

The product of its (nonzero) digits is 5184000, while the sum is 53.

The spelling of 11666043518255 in words is "eleven trillion, six hundred sixty-six billion, forty-three million, five hundred eighteen thousand, two hundred fifty-five".