16331355666 has 48 divisors (see below), whose sum is σ = 36940497984. Its totient is φ = 5204640672.

The previous prime is 16331355641. The next prime is 16331355671. The reversal of 16331355666 is 66655313361.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1000825 + ... + 1017011.

It is an arithmetic number, because the mean of its divisors is an integer number (769593708).

Almost surely, 2^16331355666 is an apocalyptic number.

16331355666 is an abundant number, since it is smaller than the sum of its proper divisors (20609142318).

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

16331355666 is a wasteful number, since it uses less digits than its factorization.

16331355666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18655 (or 18652 counting only the distinct ones).

The product of its digits is 874800, while the sum is 45.

The spelling of 16331355666 in words is "sixteen billion, three hundred thirty-one million, three hundred fifty-five thousand, six hundred sixty-six".