6778785 has 16 divisors (see below), whose sum is σ = 11680704. Its totient is φ = 3337152.

The previous prime is 6778777. The next prime is 6778799. The reversal of 6778785 is 5878776.

It is not a de Polignac number, because 6778785 - 2³ = 6778777 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17187 + ... + 17576.

It is an arithmetic number, because the mean of its divisors is an integer number (730044).

Almost surely, 2^6778785 is an apocalyptic number.

6778785 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6778785 is a deficient number, since it is larger than the sum of its proper divisors (4901919).

6778785 is a wasteful number, since it uses less digits than its factorization.

6778785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34784.

The product of its digits is 658560, while the sum is 48.

The square root of 6778785 is about 2603.6099938355. The cubic root of 6778785 is about 189.2564196812.

Subtracting from 6778785 its reverse (5878776), we obtain a palindrome (900009).

The spelling of 6778785 in words is "six million, seven hundred seventy-eight thousand, seven hundred eighty-five".