6878657 has 2 divisors, whose sum is σ = 6878658. Its totient is φ = 6878656.

The previous prime is 6878647. The next prime is 6878671. The reversal of 6878657 is 7568786.

6878657 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6677056 + 201601 = 2584^2 + 449^2 .

It is a cyclic number.

It is not a de Polignac number, because 6878657 - 2⁶ = 6878593 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (6878617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3439328 + 3439329.

It is an arithmetic number, because the mean of its divisors is an integer number (3439329).

Almost surely, 2^6878657 is an apocalyptic number.

It is an amenable number.

6878657 is a deficient number, since it is larger than the sum of its proper divisors (1).

6878657 is an equidigital number, since it uses as much as digits as its factorization.

6878657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 47.

The square root of 6878657 is about 2622.7193902513. The cubic root of 6878657 is about 190.1813319641.

The spelling of 6878657 in words is "six million, eight hundred seventy-eight thousand, six hundred fifty-seven".