6726581 has 2 divisors, whose sum is σ = 6726582. Its totient is φ = 6726580.

The previous prime is 6726571. The next prime is 6726607. The reversal of 6726581 is 1856276.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6100900 + 625681 = 2470^2 + 791^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6726581 is a prime.

It is a super-2 number, since 2×6726581² = 90493783899122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6726571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3363290 + 3363291.

It is an arithmetic number, because the mean of its divisors is an integer number (3363291).

Almost surely, 2^6726581 is an apocalyptic number.

It is an amenable number.

6726581 is a deficient number, since it is larger than the sum of its proper divisors (1).

6726581 is an equidigital number, since it uses as much as digits as its factorization.

6726581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 35.

The square root of 6726581 is about 2593.5653066773. The cubic root of 6726581 is about 188.7693405909.

The spelling of 6726581 in words is "six million, seven hundred twenty-six thousand, five hundred eighty-one".