6778868 has 6 divisors (see below), whose sum is σ = 11863026. Its totient is φ = 3389432.

The previous prime is 6778861. The next prime is 6778921. The reversal of 6778868 is 8688776.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 6770404 + 8464 = 2602^2 + 92^2 .

It is a super-2 number, since 2×6778868² = 91906102722848, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6778861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 847355 + ... + 847362.

It is an arithmetic number, because the mean of its divisors is an integer number (1977171).

Almost surely, 2^6778868 is an apocalyptic number.

It is an amenable number.

6778868 is a deficient number, since it is larger than the sum of its proper divisors (5084158).

6778868 is a wasteful number, since it uses less digits than its factorization.

6778868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1694721 (or 1694719 counting only the distinct ones).

The product of its digits is 903168, while the sum is 50.

The square root of 6778868 is about 2603.6259331939. The cubic root of 6778868 is about 189.2571921017.

The spelling of 6778868 in words is "six million, seven hundred seventy-eight thousand, eight hundred sixty-eight".