6681687 has 8 divisors (see below), whose sum is σ = 9216240. Its totient is φ = 4300800.

The previous prime is 6681683. The next prime is 6681721. The reversal of 6681687 is 7861866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6681687 - 2² = 6681683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6681683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38314 + ... + 38487.

It is an arithmetic number, because the mean of its divisors is an integer number (1152030).

Almost surely, 2^6681687 is an apocalyptic number.

6681687 is a deficient number, since it is larger than the sum of its proper divisors (2534553).

6681687 is a wasteful number, since it uses less digits than its factorization.

6681687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76833.

The product of its digits is 96768, while the sum is 42.

The square root of 6681687 is about 2584.8959360098. The cubic root of 6681687 is about 188.3484465034.

The spelling of 6681687 in words is "six million, six hundred eighty-one thousand, six hundred eighty-seven".