6978678 has 32 divisors (see below), whose sum is σ = 16281600. Its totient is φ = 1993320.

The previous prime is 6978677. The next prime is 6978703. The reversal of 6978678 is 8768796.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 6978678.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6978677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 363 + ... + 3753.

It is an arithmetic number, because the mean of its divisors is an integer number (508800).

Almost surely, 2^6978678 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6978678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8140800).

6978678 is an abundant number, since it is smaller than the sum of its proper divisors (9302922).

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

6978678 is a wasteful number, since it uses less digits than its factorization.

6978678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3417 (or 3403 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 51.

The square root of 6978678 is about 2641.7187586872. The cubic root of 6978678 is about 191.0986944590.

The spelling of 6978678 in words is "six million, nine hundred seventy-eight thousand, six hundred seventy-eight".