11660065566 has 16 divisors (see below), whose sum is σ = 23332604304. Its totient is φ = 3884609664.

The previous prime is 11660065541. The next prime is 11660065567. The reversal of 11660065566 is 66556006611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11660065567) 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 7 ways as a sum of consecutive naturals, for example, 507541 + ... + 530016.

It is an arithmetic number, because the mean of its divisors is an integer number (1458287769).

Almost surely, 2^11660065566 is an apocalyptic number.

11660065566 is an abundant number, since it is smaller than the sum of its proper divisors (11672538738).

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

11660065566 is a wasteful number, since it uses less digits than its factorization.

11660065566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039435.

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 11660065566 in words is "eleven billion, six hundred sixty million, sixty-five thousand, five hundred sixty-six".