6681788 has 6 divisors (see below), whose sum is σ = 11693136. Its totient is φ = 3340892.

The previous prime is 6681781. The next prime is 6681791. The reversal of 6681788 is 8871866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6681781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835220 + ... + 835227.

It is an arithmetic number, because the mean of its divisors is an integer number (1948856).

Almost surely, 2^6681788 is an apocalyptic number.

It is an amenable number.

6681788 is a deficient number, since it is larger than the sum of its proper divisors (5011348).

6681788 is a wasteful number, since it uses less digits than its factorization.

6681788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1670451 (or 1670449 counting only the distinct ones).

The product of its digits is 129024, while the sum is 44.

The square root of 6681788 is about 2584.9154725058. The cubic root of 6681788 is about 188.3493955201.

The spelling of 6681788 in words is "six million, six hundred eighty-one thousand, seven hundred eighty-eight".