6878785 has 4 divisors (see below), whose sum is σ = 8254548. Its totient is φ = 5503024.

The previous prime is 6878777. The next prime is 6878789. The reversal of 6878785 is 5878786.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5878786 = 2 ⋅2939393.

It can be written as a sum of positive squares in 2 ways, for example, as 1721344 + 5157441 = 1312^2 + 2271^2 .

It is a cyclic number.

It is not a de Polignac number, because 6878785 - 2³ = 6878777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6878789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 687874 + ... + 687883.

It is an arithmetic number, because the mean of its divisors is an integer number (2063637).

Almost surely, 2^6878785 is an apocalyptic number.

It is an amenable number.

6878785 is a deficient number, since it is larger than the sum of its proper divisors (1375763).

6878785 is a wasteful number, since it uses less digits than its factorization.

6878785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1375762.

The product of its digits is 752640, while the sum is 49.

The square root of 6878785 is about 2622.7437922908. The cubic root of 6878785 is about 190.1825116061.

Subtracting from 6878785 its reverse (5878786), we obtain a palindrome (999999).

The spelling of 6878785 in words is "six million, eight hundred seventy-eight thousand, seven hundred eighty-five".