11665151666 has 16 divisors (see below), whose sum is σ = 20002187520. Its totient is φ = 4998154560.

The previous prime is 11665151639. The next prime is 11665151689. The reversal of 11665151666 is 66615156611.

11665151666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37751 + ... + 157338.

It is an arithmetic number, because the mean of its divisors is an integer number (1250136720).

Almost surely, 2^11665151666 is an apocalyptic number.

11665151666 is a deficient number, since it is larger than the sum of its proper divisors (8337035854).

11665151666 is a wasteful number, since it uses less digits than its factorization.

11665151666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199369.

The product of its digits is 194400, while the sum is 44.

The spelling of 11665151666 in words is "eleven billion, six hundred sixty-five million, one hundred fifty-one thousand, six hundred sixty-six".