671680 has 28 divisors (see below), whose sum is σ = 1600200. Its totient is φ = 268544.

The previous prime is 671651. The next prime is 671681. The reversal of 671680 is 86176.

671680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 730 + ... + 1369.

It is an arithmetic number, because the mean of its divisors is an integer number (57150).

2⁶⁷¹⁶⁸⁰ is an apocalyptic number.

It is an amenable number.

671680 is an abundant number, since it is smaller than the sum of its proper divisors (928520).

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

671680 is a wasteful number, since it uses less digits than its factorization.

671680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2116 (or 2106 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 671680 is about 819.5608580209. The cubic root of 671680 is about 87.5764773549.

The spelling of 671680 in words is "six hundred seventy-one thousand, six hundred eighty".