6681744 has 40 divisors (see below), whose sum is σ = 19180320. Its totient is φ = 2227104.

The previous prime is 6681733. The next prime is 6681751. The reversal of 6681744 is 4471866.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 6681699 and 6681708.

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, 7302 + ... + 8165.

It is an arithmetic number, because the mean of its divisors is an integer number (479508).

Almost surely, 2^6681744 is an apocalyptic number.

It is an amenable number.

6681744 is an abundant number, since it is smaller than the sum of its proper divisors (12498576).

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

6681744 is a wasteful number, since it uses less digits than its factorization.

6681744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15484 (or 15472 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 6681744 is about 2584.9069615752. The cubic root of 6681744 is about 188.3489820883.

It can be divided in two parts, 66 and 81744, that added together give a triangular number (81810 = T₄₀₄).

The spelling of 6681744 in words is "six million, six hundred eighty-one thousand, seven hundred forty-four".