6778115 has 4 divisors (see below), whose sum is σ = 8133744. Its totient is φ = 5422488.

The previous prime is 6778111. The next prime is 6778127. The reversal of 6778115 is 5118776.

6778115 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 6778115 - 2² = 6778111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6778111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 677807 + ... + 677816.

It is an arithmetic number, because the mean of its divisors is an integer number (2033436).

Almost surely, 2^6778115 is an apocalyptic number.

6778115 is a deficient number, since it is larger than the sum of its proper divisors (1355629).

6778115 is a wasteful number, since it uses less digits than its factorization.

6778115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355628.

The product of its digits is 11760, while the sum is 35.

The square root of 6778115 is about 2603.4813231518. The cubic root of 6778115 is about 189.2501842482.

The spelling of 6778115 in words is "six million, seven hundred seventy-eight thousand, one hundred fifteen".