6780078 has 64 divisors (see below), whose sum is σ = 16174080. Its totient is φ = 2100384.

The previous prime is 6780077. The next prime is 6780083. The reversal of 6780078 is 8700876.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6780073) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65775 + ... + 65877.

It is an arithmetic number, because the mean of its divisors is an integer number (252720).

Almost surely, 2^6780078 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6780078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8087040).

6780078 is an abundant number, since it is smaller than the sum of its proper divisors (9394002).

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

6780078 is a wasteful number, since it uses less digits than its factorization.

6780078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190 (or 184 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 6780078 is about 2603.8582910750. The cubic root of 6780078 is about 189.2684519747.

The spelling of 6780078 in words is "six million, seven hundred eighty thousand, seventy-eight".