6778144 has 12 divisors (see below), whose sum is σ = 13344534. Its totient is φ = 3389056.

The previous prime is 6778127. The next prime is 6778147. The reversal of 6778144 is 4418776.

It can be written as a sum of positive squares in only one way, i.e., 5817744 + 960400 = 2412^2 + 980^2 .

It is not an unprimeable number, because it can be changed into a prime (6778147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105877 + ... + 105940.

Almost surely, 2^6778144 is an apocalyptic number.

It is an amenable number.

6778144 is a deficient number, since it is larger than the sum of its proper divisors (6566390).

6778144 is a wasteful number, since it uses less digits than its factorization.

6778144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211827 (or 211819 counting only the distinct ones).

The product of its digits is 37632, while the sum is 37.

The square root of 6778144 is about 2603.4868926115. The cubic root of 6778144 is about 189.2504541486.

The spelling of 6778144 in words is "six million, seven hundred seventy-eight thousand, one hundred forty-four".