16320320066 has 16 divisors (see below), whose sum is σ = 25786071360. Its totient is φ = 7725534480.

The previous prime is 16320320021. The next prime is 16320320077. The reversal of 16320320066 is 66002302361.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84701 + ... + 199536.

It is an arithmetic number, because the mean of its divisors is an integer number (1611629460).

Almost surely, 2^16320320066 is an apocalyptic number.

16320320066 is a deficient number, since it is larger than the sum of its proper divisors (9465751294).

16320320066 is a wasteful number, since it uses less digits than its factorization.

16320320066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285769.

The product of its (nonzero) digits is 7776, while the sum is 29.

The spelling of 16320320066 in words is "sixteen billion, three hundred twenty million, three hundred twenty thousand, sixty-six".