18066065536 has 32 divisors (see below), whose sum is σ = 36347362380. Its totient is φ = 8943590400.

The previous prime is 18066065509. The next prime is 18066065543. The reversal of 18066065536 is 63556066081.

It can be written as a sum of positive squares in 2 ways, for example, as 12087683136 + 5978382400 = 109944^2 + 77320^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 685791 + ... + 711646.

Almost surely, 2^18066065536 is an apocalyptic number.

18066065536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18066065536 is an abundant number, since it is smaller than the sum of its proper divisors (18281296844).

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

18066065536 is a wasteful number, since it uses less digits than its factorization.

18066065536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397552 (or 1397540 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 46.

The spelling of 18066065536 in words is "eighteen billion, sixty-six million, sixty-five thousand, five hundred thirty-six".