6778005 has 16 divisors (see below), whose sum is σ = 11679360. Its totient is φ = 3336768.

The previous prime is 6777989. The next prime is 6778021. The reversal of 6778005 is 5008776.

It is an interprime number because it is at equal distance from previous prime (6777989) and next prime (6778021).

It is not a de Polignac number, because 6778005 - 2⁴ = 6777989 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 17185 + ... + 17574.

It is an arithmetic number, because the mean of its divisors is an integer number (729960).

Almost surely, 2^6778005 is an apocalyptic number.

6778005 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6778005 is a deficient number, since it is larger than the sum of its proper divisors (4901355).

6778005 is a wasteful number, since it uses less digits than its factorization.

6778005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34780.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 6778005 is about 2603.4601975064. The cubic root of 6778005 is about 189.2491604811.

The spelling of 6778005 in words is "six million, seven hundred seventy-eight thousand, five".