6678784 has 36 divisors (see below), whose sum is σ = 15240064. Its totient is φ = 2861568.

The previous prime is 6678779. The next prime is 6678797. The reversal of 6678784 is 4878766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72 + ... + 3655.

Almost surely, 2^6678784 is an apocalyptic number.

6678784 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6678784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7620032).

6678784 is an abundant number, since it is smaller than the sum of its proper divisors (8561280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6678784 is an equidigital number, since it uses as much as digits as its factorization.

6678784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3750 (or 3736 counting only the distinct ones).

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

The square root of 6678784 is about 2584.3343436947. The cubic root of 6678784 is about 188.3211652322.

It can be divided in two parts, 6 and 678784, that multiplied together give a palindrome (4072704).

The spelling of 6678784 in words is "six million, six hundred seventy-eight thousand, seven hundred eighty-four".