6778064 has 20 divisors (see below), whose sum is σ = 13381956. Its totient is φ = 3324672.

The previous prime is 6778063. The next prime is 6778073. The reversal of 6778064 is 4608776.

It can be written as a sum of positive squares in 2 ways, for example, as 2534464 + 4243600 = 1592^2 + 2060^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6778061) 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, 3149 + ... + 4844.

Almost surely, 2^6778064 is an apocalyptic number.

It is an amenable number.

6778064 is a deficient number, since it is larger than the sum of its proper divisors (6603892).

6778064 is a wasteful number, since it uses less digits than its factorization.

6778064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8054 (or 8048 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 6778064 is about 2603.4715285557. The cubic root of 6778064 is about 189.2497095939.

The spelling of 6778064 in words is "six million, seven hundred seventy-eight thousand, sixty-four".