6681886 has 4 divisors (see below), whose sum is σ = 10022832. Its totient is φ = 3340942.

The previous prime is 6681877. The next prime is 6681887. The reversal of 6681886 is 6881866.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6881866 = 2 ⋅3440933.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6681887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1670470 + ... + 1670473.

It is an arithmetic number, because the mean of its divisors is an integer number (2505708).

Almost surely, 2^6681886 is an apocalyptic number.

6681886 is a deficient number, since it is larger than the sum of its proper divisors (3340946).

6681886 is a wasteful number, since it uses less digits than its factorization.

6681886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3340945.

The product of its digits is 110592, while the sum is 43.

The square root of 6681886 is about 2584.9344285687. The cubic root of 6681886 is about 188.3503163390.

The spelling of 6681886 in words is "six million, six hundred eighty-one thousand, eight hundred eighty-six".