6605581259 has 4 divisors (see below), whose sum is σ = 6605745216. Its totient is φ = 6605417304.

The previous prime is 6605581219. The next prime is 6605581273. The reversal of 6605581259 is 9521855066.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6605581259 - 2¹² = 6605577163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6605581219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24917 + ... + 117609.

It is an arithmetic number, because the mean of its divisors is an integer number (1651436304).

Almost surely, 2^6605581259 is an apocalyptic number.

6605581259 is a deficient number, since it is larger than the sum of its proper divisors (163957).

6605581259 is an equidigital number, since it uses as much as digits as its factorization.

6605581259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163956.

The product of its (nonzero) digits is 648000, while the sum is 47.

The square root of 6605581259 is about 81274.7270619840. The cubic root of 6605581259 is about 1876.3060538575.

The spelling of 6605581259 in words is "six billion, six hundred five million, five hundred eighty-one thousand, two hundred fifty-nine".