6805581 has 8 divisors (see below), whose sum is σ = 9143904. Its totient is φ = 4502160.

The previous prime is 6805577. The next prime is 6805597. The reversal of 6805581 is 1855086.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6805581 - 2² = 6805577 is a prime.

It is a super-2 number, since 2×6805581² = 92631865495122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6805501) 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 in 7 ways as a sum of consecutive naturals, for example, 8266 + ... + 9051.

It is an arithmetic number, because the mean of its divisors is an integer number (1142988).

Almost surely, 2^6805581 is an apocalyptic number.

It is an amenable number.

6805581 is a deficient number, since it is larger than the sum of its proper divisors (2338323).

6805581 is a wasteful number, since it uses less digits than its factorization.

6805581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17451.

The product of its (nonzero) digits is 9600, while the sum is 33.

The square root of 6805581 is about 2608.7508505030. The cubic root of 6805581 is about 189.5054636956.

The spelling of 6805581 in words is "six million, eight hundred five thousand, five hundred eighty-one".