6780881 has 2 divisors, whose sum is σ = 6780882. Its totient is φ = 6780880.

The previous prime is 6780871. The next prime is 6780901. The reversal of 6780881 is 1880876.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6713281 + 67600 = 2591^2 + 260^2 .

It is a cyclic number.

It is not a de Polignac number, because 6780881 - 2⁶ = 6780817 is a prime.

It is a super-2 number, since 2×6780881² = 91960694272322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6780871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3390440 + 3390441.

It is an arithmetic number, because the mean of its divisors is an integer number (3390441).

Almost surely, 2^6780881 is an apocalyptic number.

It is an amenable number.

6780881 is a deficient number, since it is larger than the sum of its proper divisors (1).

6780881 is an equidigital number, since it uses as much as digits as its factorization.

6780881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21504, while the sum is 38.

The square root of 6780881 is about 2604.0124807689. The cubic root of 6780881 is about 189.2759236964.

The spelling of 6780881 in words is "six million, seven hundred eighty thousand, eight hundred eighty-one".