6778069 has 4 divisors (see below), whose sum is σ = 6848044. Its totient is φ = 6708096.

The previous prime is 6778063. The next prime is 6778073. The reversal of 6778069 is 9608776.

6778069 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1199025 + 5579044 = 1095^2 + 2362^2 .

It is a cyclic number.

It is not a de Polignac number, because 6778069 - 2³ = 6778061 is a prime.

It is a super-2 number, since 2×6778069² = 91884438737522, which contains 22 as substring.

It is a Duffinian number.

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, 34842 + ... + 35035.

It is an arithmetic number, because the mean of its divisors is an integer number (1712011).

Almost surely, 2^6778069 is an apocalyptic number.

It is an amenable number.

6778069 is a deficient number, since it is larger than the sum of its proper divisors (69975).

6778069 is an equidigital number, since it uses as much as digits as its factorization.

6778069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69974.

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 6778069 is about 2603.4724888118. The cubic root of 6778069 is about 189.2497561287.

The spelling of 6778069 in words is "six million, seven hundred seventy-eight thousand, sixty-nine".