6681908 has 6 divisors (see below), whose sum is σ = 11693346. Its totient is φ = 3340952.

The previous prime is 6681889. The next prime is 6681923. The reversal of 6681908 is 8091866.

It can be written as a sum of positive squares in only one way, i.e., 3541924 + 3139984 = 1882^2 + 1772^2 .

It is a super-3 number, since 3×6681908³ (a number of 21 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835235 + ... + 835242.

It is an arithmetic number, because the mean of its divisors is an integer number (1948891).

Almost surely, 2^6681908 is an apocalyptic number.

It is an amenable number.

6681908 is a deficient number, since it is larger than the sum of its proper divisors (5011438).

6681908 is a wasteful number, since it uses less digits than its factorization.

6681908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1670481 (or 1670479 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 6681908 is about 2584.9386839923. The cubic root of 6681908 is about 188.3505230523.

The spelling of 6681908 in words is "six million, six hundred eighty-one thousand, nine hundred eight".