6778818 has 24 divisors (see below), whose sum is σ = 15552108. Its totient is φ = 2126592.

The previous prime is 6778799. The next prime is 6778823. The reversal of 6778818 is 8188776.

It can be written as a sum of positive squares in 2 ways, for example, as 6671889 + 106929 = 2583^2 + 327^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10771 + ... + 11382.

Almost surely, 2^6778818 is an apocalyptic number.

6778818 is an abundant number, since it is smaller than the sum of its proper divisors (8773290).

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

6778818 is a wasteful number, since it uses less digits than its factorization.

6778818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22178 (or 22175 counting only the distinct ones).

The product of its digits is 150528, while the sum is 45.

The square root of 6778818 is about 2603.6163311825. The cubic root of 6778818 is about 189.2567267889.

The spelling of 6778818 in words is "six million, seven hundred seventy-eight thousand, eight hundred eighteen".