6681879 has 16 divisors (see below), whose sum is σ = 10063840. Its totient is φ = 4380480.

The previous prime is 6681877. The next prime is 6681887. The reversal of 6681879 is 9781866.

It is a happy number.

It is not a de Polignac number, because 6681879 - 2¹ = 6681877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6681877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 382 + ... + 3675.

It is an arithmetic number, because the mean of its divisors is an integer number (628990).

Almost surely, 2^6681879 is an apocalyptic number.

6681879 is a deficient number, since it is larger than the sum of its proper divisors (3381961).

6681879 is a wasteful number, since it uses less digits than its factorization.

6681879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4127 (or 4121 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 6681879 is about 2584.9330745689. The cubic root of 6681879 is about 188.3502505666.

The spelling of 6681879 in words is "six million, six hundred eighty-one thousand, eight hundred seventy-nine".