321989881166 has 8 divisors (see below), whose sum is σ = 483765089880. Its totient is φ = 160734851208.

The previous prime is 321989881133. The next prime is 321989881183. The reversal of 321989881166 is 661188989123.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 321989881099 and 321989881108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130043141 + ... + 130045616.

It is an arithmetic number, because the mean of its divisors is an integer number (60470636235).

Almost surely, 2^321989881166 is an apocalyptic number.

321989881166 is a deficient number, since it is larger than the sum of its proper divisors (161775208714).

321989881166 is a wasteful number, since it uses less digits than its factorization.

321989881166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260089378.

The product of its digits is 8957952, while the sum is 62.

The spelling of 321989881166 in words is "three hundred twenty-one billion, nine hundred eighty-nine million, eight hundred eighty-one thousand, one hundred sixty-six".