6681694 has 4 divisors (see below), whose sum is σ = 10022544. Its totient is φ = 3340846.

The previous prime is 6681683. The next prime is 6681721. The reversal of 6681694 is 4961866.

It is a semiprime because it is the product of two primes.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1670422 + ... + 1670425.

It is an arithmetic number, because the mean of its divisors is an integer number (2505636).

Almost surely, 2^6681694 is an apocalyptic number.

6681694 is a deficient number, since it is larger than the sum of its proper divisors (3340850).

6681694 is a wasteful number, since it uses less digits than its factorization.

6681694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3340849.

The product of its digits is 62208, while the sum is 40.

The square root of 6681694 is about 2584.8972900291. The cubic root of 6681694 is about 188.3485122772.

The spelling of 6681694 in words is "six million, six hundred eighty-one thousand, six hundred ninety-four".