671943168 has 160 divisors (see below), whose sum is σ = 2142571200. Its totient is φ = 206696448.

The previous prime is 671943143. The next prime is 671943191. The reversal of 671943168 is 861349176.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177843 + ... + 181581.

It is an arithmetic number, because the mean of its divisors is an integer number (13391070).

Almost surely, 2^671943168 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671943168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1071285600).

671943168 is an abundant number, since it is smaller than the sum of its proper divisors (1470628032).

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

671943168 is a wasteful number, since it uses less digits than its factorization.

671943168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3779 (or 3757 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 671943168 is about 25921.8665994561. The cubic root of 671943168 is about 875.8791351355.

The spelling of 671943168 in words is "six hundred seventy-one million, nine hundred forty-three thousand, one hundred sixty-eight".