6879665 has 16 divisors (see below), whose sum is σ = 9062928. Its totient is φ = 4982016.

The previous prime is 6879661. The next prime is 6879671. The reversal of 6879665 is 5669786.

It can be written as a sum of positive squares in 8 ways, for example, as 1385329 + 5494336 = 1177^2 + 2344^2 .

It is not a de Polignac number, because 6879665 - 2² = 6879661 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6879661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2447 + ... + 4443.

It is an arithmetic number, because the mean of its divisors is an integer number (566433).

Almost surely, 2^6879665 is an apocalyptic number.

6879665 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6879665 is a deficient number, since it is larger than the sum of its proper divisors (2183263).

6879665 is a wasteful number, since it uses less digits than its factorization.

6879665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2068.

The product of its digits is 544320, while the sum is 47.

The square root of 6879665 is about 2622.9115501671. The cubic root of 6879665 is about 190.1906212492.

The spelling of 6879665 in words is "six million, eight hundred seventy-nine thousand, six hundred sixty-five".