11650515666 has 16 divisors (see below), whose sum is σ = 24052677888. Its totient is φ = 3758230800.

The previous prime is 11650515661. The next prime is 11650515707. The reversal of 11650515666 is 66651505611.

11650515666 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 2×11650515666² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11650515661) by changing a digit.

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, 31318405 + ... + 31318776.

It is an arithmetic number, because the mean of its divisors is an integer number (1503292368).

Almost surely, 2^11650515666 is an apocalyptic number.

11650515666 is an abundant number, since it is smaller than the sum of its proper divisors (12402162222).

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

11650515666 is a wasteful number, since it uses less digits than its factorization.

11650515666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62637217.

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

The spelling of 11650515666 in words is "eleven billion, six hundred fifty million, five hundred fifteen thousand, six hundred sixty-six".