6778618 has 16 divisors (see below), whose sum is σ = 12677184. Its totient is φ = 2640960.

The previous prime is 6778589. The next prime is 6778621. The reversal of 6778618 is 8168776.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21855 + ... + 22162.

It is an arithmetic number, because the mean of its divisors is an integer number (792324).

Almost surely, 2^6778618 is an apocalyptic number.

6778618 is a deficient number, since it is larger than the sum of its proper divisors (5898566).

6778618 is a wasteful number, since it uses less digits than its factorization.

6778618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44037.

The product of its digits is 112896, while the sum is 43.

The square root of 6778618 is about 2603.5779227824. The cubic root of 6778618 is about 189.2548655147.

It can be divided in two parts, 6778 and 618, that added together give a square (7396 = 86²).

The spelling of 6778618 in words is "six million, seven hundred seventy-eight thousand, six hundred eighteen".