671521168 has 40 divisors (see below), whose sum is σ = 1326522240. Its totient is φ = 329239680.

The previous prime is 671521159. The next prime is 671521181. The reversal of 671521168 is 861125176.

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, 254898 + ... + 257518.

It is an arithmetic number, because the mean of its divisors is an integer number (33163056).

Almost surely, 2^671521168 is an apocalyptic number.

It is an amenable number.

671521168 is a deficient number, since it is larger than the sum of its proper divisors (655001072).

671521168 is a wasteful number, since it uses less digits than its factorization.

671521168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2935 (or 2929 counting only the distinct ones).

The product of its digits is 20160, while the sum is 37.

The square root of 671521168 is about 25913.7254751223. The cubic root of 671521168 is about 875.6957374826.

The spelling of 671521168 in words is "six hundred seventy-one million, five hundred twenty-one thousand, one hundred sixty-eight".