6782155 has 4 divisors (see below), whose sum is σ = 8138592. Its totient is φ = 5425720.

The previous prime is 6782129. The next prime is 6782159. The reversal of 6782155 is 5512876.

6782155 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 is not a de Polignac number, because 6782155 - 2⁵ = 6782123 is a prime.

It is a Duffinian number.

6782155 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6782155.

It is not an unprimeable number, because it can be changed into a prime (6782159) 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, 678211 + ... + 678220.

It is an arithmetic number, because the mean of its divisors is an integer number (2034648).

Almost surely, 2^6782155 is an apocalyptic number.

6782155 is a deficient number, since it is larger than the sum of its proper divisors (1356437).

6782155 is a wasteful number, since it uses less digits than its factorization.

6782155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356436.

The product of its digits is 16800, while the sum is 34.

The square root of 6782155 is about 2604.2570917634. The cubic root of 6782155 is about 189.2877767495.

It can be divided in two parts, 67821 and 55, that added together give a palindrome (67876).

The spelling of 6782155 in words is "six million, seven hundred eighty-two thousand, one hundred fifty-five".