6478668 has 72 divisors (see below), whose sum is σ = 19149312. Its totient is φ = 1808352.

The previous prime is 6478631. The next prime is 6478673. The reversal of 6478668 is 8668746.

It is a happy number.

6478668 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11571 + ... + 12117.

Almost surely, 2^6478668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6478668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9574656).

6478668 is an abundant number, since it is smaller than the sum of its proper divisors (12670644).

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

6478668 is a wasteful number, since it uses less digits than its factorization.

6478668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611 (or 606 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 6478668 is about 2545.3227693163. The cubic root of 6478668 is about 186.4211753038.

The spelling of 6478668 in words is "six million, four hundred seventy-eight thousand, six hundred sixty-eight".