6780581 has 2 divisors, whose sum is σ = 6780582. Its totient is φ = 6780580.

The previous prime is 6780551. The next prime is 6780611. The reversal of 6780581 is 1850876.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (6780551) and next prime (6780611).

It can be written as a sum of positive squares in only one way, i.e., 4268356 + 2512225 = 2066^2 + 1585^2 .

It is a cyclic number.

It is not a de Polignac number, because 6780581 - 2⁶ = 6780517 is a prime.

It is a super-2 number, since 2×6780581² = 91952557395122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6780551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3390290 + 3390291.

It is an arithmetic number, because the mean of its divisors is an integer number (3390291).

Almost surely, 2^6780581 is an apocalyptic number.

It is an amenable number.

6780581 is a deficient number, since it is larger than the sum of its proper divisors (1).

6780581 is an equidigital number, since it uses as much as digits as its factorization.

6780581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 6780581 is about 2603.9548767212. The cubic root of 6780581 is about 189.2731323377.

The spelling of 6780581 in words is "six million, seven hundred eighty thousand, five hundred eighty-one".