6786478 has 4 divisors (see below), whose sum is σ = 10179720. Its totient is φ = 3393238.

The previous prime is 6786473. The next prime is 6786509. The reversal of 6786478 is 8746876.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6786473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1696618 + ... + 1696621.

It is an arithmetic number, because the mean of its divisors is an integer number (2544930).

Almost surely, 2^6786478 is an apocalyptic number.

6786478 is a deficient number, since it is larger than the sum of its proper divisors (3393242).

6786478 is a wasteful number, since it uses less digits than its factorization.

6786478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3393241.

The product of its digits is 451584, while the sum is 46.

The square root of 6786478 is about 2605.0869467256. The cubic root of 6786478 is about 189.3279860565.

The spelling of 6786478 in words is "six million, seven hundred eighty-six thousand, four hundred seventy-eight".