6778065 has 16 divisors (see below), whose sum is σ = 12394368. Its totient is φ = 3098496.

The previous prime is 6778063. The next prime is 6778073. The reversal of 6778065 is 5608776.

It is not a de Polignac number, because 6778065 - 2¹ = 6778063 is a prime.

6778065 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6778061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32172 + ... + 32381.

It is an arithmetic number, because the mean of its divisors is an integer number (774648).

Almost surely, 2^6778065 is an apocalyptic number.

It is an amenable number.

6778065 is a deficient number, since it is larger than the sum of its proper divisors (5616303).

6778065 is a wasteful number, since it uses less digits than its factorization.

6778065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64568.

The product of its (nonzero) digits is 70560, while the sum is 39.

The square root of 6778065 is about 2603.4717206069. The cubic root of 6778065 is about 189.2497189009.

The spelling of 6778065 in words is "six million, seven hundred seventy-eight thousand, sixty-five".