11115131666 has 8 divisors (see below), whose sum is σ = 16734221184. Its totient is φ = 5537057940.

The previous prime is 11115131647. The next prime is 11115131771. The reversal of 11115131666 is 66613151111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10253270 + ... + 10254353.

It is an arithmetic number, because the mean of its divisors is an integer number (2091777648).

Almost surely, 2^11115131666 is an apocalyptic number.

11115131666 is a deficient number, since it is larger than the sum of its proper divisors (5619089518).

11115131666 is a wasteful number, since it uses less digits than its factorization.

11115131666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20507896.

The product of its digits is 3240, while the sum is 32.

Adding to 11115131666 its reverse (66613151111), we get a palindrome (77728282777).

The spelling of 11115131666 in words is "eleven billion, one hundred fifteen million, one hundred thirty-one thousand, six hundred sixty-six".