6780856 has 8 divisors (see below), whose sum is σ = 12714120. Its totient is φ = 3390424.

The previous prime is 6780833. The next prime is 6780857. The reversal of 6780856 is 6580876.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6780857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 423796 + ... + 423811.

It is an arithmetic number, because the mean of its divisors is an integer number (1589265).

Almost surely, 2^6780856 is an apocalyptic number.

It is an amenable number.

6780856 is a deficient number, since it is larger than the sum of its proper divisors (5933264).

6780856 is a wasteful number, since it uses less digits than its factorization.

6780856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847613 (or 847609 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 6780856 is about 2604.0076804802. The cubic root of 6780856 is about 189.2756910863.

Subtracting from 6780856 its sum of digits (40), we obtain a square (6780816 = 2604²).

The spelling of 6780856 in words is "six million, seven hundred eighty thousand, eight hundred fifty-six".