6681648 has 20 divisors (see below), whose sum is σ = 17261048. Its totient is φ = 2227200.

The previous prime is 6681637. The next prime is 6681671. The reversal of 6681648 is 8461866.

It is a nude number because it is divisible by every one of its digits.

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 3 ways as a sum of consecutive naturals, for example, 69553 + ... + 69648.

Almost surely, 2^6681648 is an apocalyptic number.

It is an amenable number.

6681648 is an abundant number, since it is smaller than the sum of its proper divisors (10579400).

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

6681648 is a wasteful number, since it uses less digits than its factorization.

6681648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139212 (or 139206 counting only the distinct ones).

The product of its digits is 55296, while the sum is 39.

The square root of 6681648 is about 2584.8883921748. Note that the first 3 decimals coincide. The cubic root of 6681648 is about 188.3480800489.

The spelling of 6681648 in words is "six million, six hundred eighty-one thousand, six hundred forty-eight".