18006328666 has 16 divisors (see below), whose sum is σ = 27088776000. Its totient is φ = 8976764448.

The previous prime is 18006328663. The next prime is 18006328741. The reversal of 18006328666 is 66682360081.

It is not an unprimeable number, because it can be changed into a prime (18006328661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1533285 + ... + 1544983.

It is an arithmetic number, because the mean of its divisors is an integer number (1693048500).

Almost surely, 2^18006328666 is an apocalyptic number.

18006328666 is a deficient number, since it is larger than the sum of its proper divisors (9082447334).

18006328666 is a wasteful number, since it uses less digits than its factorization.

18006328666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13893.

The product of its (nonzero) digits is 497664, while the sum is 46.

The spelling of 18006328666 in words is "eighteen billion, six million, three hundred twenty-eight thousand, six hundred sixty-six".