671307680 has 48 divisors (see below), whose sum is σ = 1587595464. Its totient is φ = 268247040.

The previous prime is 671307673. The next prime is 671307691. The reversal of 671307680 is 86703176.

671307680 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 485585296 + 185722384 = 22036^2 + 13628^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235544 + ... + 238376.

Almost surely, 2^671307680 is an apocalyptic number.

It is an amenable number.

671307680 is an abundant number, since it is smaller than the sum of its proper divisors (916287784).

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

671307680 is a wasteful number, since it uses less digits than its factorization.

671307680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4329 (or 4321 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 671307680 is about 25909.6059406545. The cubic root of 671307680 is about 875.6029281240.

The spelling of 671307680 in words is "six hundred seventy-one million, three hundred seven thousand, six hundred eighty".