6780705 has 16 divisors (see below), whose sum is σ = 11487744. Its totient is φ = 3403520.

The previous prime is 6780679. The next prime is 6780707. The reversal of 6780705 is 5070876.

It is not a de Polignac number, because 6780705 - 2¹⁷ = 6649633 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6780707) 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, 13041 + ... + 13550.

It is an arithmetic number, because the mean of its divisors is an integer number (717984).

Almost surely, 2^6780705 is an apocalyptic number.

It is an amenable number.

6780705 is a deficient number, since it is larger than the sum of its proper divisors (4707039).

6780705 is a wasteful number, since it uses less digits than its factorization.

6780705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26616.

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

The square root of 6780705 is about 2603.9786865487. The cubic root of 6780705 is about 189.2742861093.

The spelling of 6780705 in words is "six million, seven hundred eighty thousand, seven hundred five".