6681872 has 10 divisors (see below), whose sum is σ = 12946158. Its totient is φ = 3340928.

The previous prime is 6681847. The next prime is 6681877. The reversal of 6681872 is 2781866.

It can be written as a sum of positive squares in only one way, i.e., 4596736 + 2085136 = 2144^2 + 1444^2 .

It is not an unprimeable number, because it can be changed into a prime (6681877) by changing a digit.

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 as a sum of consecutive naturals, namely, 208793 + ... + 208824.

Almost surely, 2^6681872 is an apocalyptic number.

It is an amenable number.

6681872 is a deficient number, since it is larger than the sum of its proper divisors (6264286).

6681872 is a wasteful number, since it uses less digits than its factorization.

6681872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417625 (or 417619 counting only the distinct ones).

The product of its digits is 32256, while the sum is 38.

The square root of 6681872 is about 2584.9317205683. The cubic root of 6681872 is about 188.3501847940.

The spelling of 6681872 in words is "six million, six hundred eighty-one thousand, eight hundred seventy-two".