11515650666 has 32 divisors (see below), whose sum is σ = 24887640960. Its totient is φ = 3531177024.

The previous prime is 11515650617. The next prime is 11515650683. The reversal of 11515650666 is 66605651511.

11515650666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11515650666² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

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 15 ways as a sum of consecutive naturals, for example, 229086 + ... + 274793.

It is an arithmetic number, because the mean of its divisors is an integer number (777738780).

Almost surely, 2^11515650666 is an apocalyptic number.

11515650666 is an abundant number, since it is smaller than the sum of its proper divisors (13371990294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11515650666 is a wasteful number, since it uses less digits than its factorization.

11515650666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504190.

The product of its (nonzero) digits is 162000, while the sum is 42.

The spelling of 11515650666 in words is "eleven billion, five hundred fifteen million, six hundred fifty thousand, six hundred sixty-six".