6783878 has 4 divisors (see below), whose sum is σ = 10175820. Its totient is φ = 3391938.

The previous prime is 6783877. The next prime is 6783899. The reversal of 6783878 is 8783876.

It is a semiprime because it is the product of two primes.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6783877) 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 as a sum of consecutive naturals, namely, 1695968 + ... + 1695971.

It is an arithmetic number, because the mean of its divisors is an integer number (2543955).

Almost surely, 2^6783878 is an apocalyptic number.

6783878 is a deficient number, since it is larger than the sum of its proper divisors (3391942).

6783878 is a wasteful number, since it uses less digits than its factorization.

6783878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3391941.

The product of its digits is 451584, while the sum is 47.

The square root of 6783878 is about 2604.5878752693. The cubic root of 6783878 is about 189.3038048519.

The spelling of 6783878 in words is "six million, seven hundred eighty-three thousand, eight hundred seventy-eight".