6780871 has 2 divisors, whose sum is σ = 6780872. Its totient is φ = 6780870.

The previous prime is 6780863. The next prime is 6780881. The reversal of 6780871 is 1780876.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6780871 - 2³ = 6780863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6780871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6780881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3390435 + 3390436.

It is an arithmetic number, because the mean of its divisors is an integer number (3390436).

Almost surely, 2^6780871 is an apocalyptic number.

6780871 is a deficient number, since it is larger than the sum of its proper divisors (1).

6780871 is an equidigital number, since it uses as much as digits as its factorization.

6780871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18816, while the sum is 37.

The square root of 6780871 is about 2604.0105606545. The cubic root of 6780871 is about 189.2758306525.

The spelling of 6780871 in words is "six million, seven hundred eighty thousand, eight hundred seventy-one".