6878661 has 4 divisors (see below), whose sum is σ = 9171552. Its totient is φ = 4585772.

The previous prime is 6878657. The next prime is 6878671. The reversal of 6878661 is 1668786.

6878661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6878661 - 2² = 6878657 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6878671) 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 3 ways as a sum of consecutive naturals, for example, 1146441 + ... + 1146446.

It is an arithmetic number, because the mean of its divisors is an integer number (2292888).

Almost surely, 2^6878661 is an apocalyptic number.

It is an amenable number.

6878661 is a deficient number, since it is larger than the sum of its proper divisors (2292891).

6878661 is a wasteful number, since it uses less digits than its factorization.

6878661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2292890.

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

The square root of 6878661 is about 2622.7201528184. The cubic root of 6878661 is about 190.1813688281.

The spelling of 6878661 in words is "six million, eight hundred seventy-eight thousand, six hundred sixty-one".