6688459089 has 63 divisors (see below), whose sum is σ = 10905635937. Its totient is φ = 4098309696.

The previous prime is 6688459069. The next prime is 6688459111. The reversal of 6688459089 is 9809548866.

The square root of 6688459089 is 81783.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 2832049089 + 3856410000 = 53217^2 + 62100^2 .

It is not a de Polignac number, because 6688459089 - 2⁷ = 6688458961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6688459069) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 28705717 + ... + 28705949.

Almost surely, 2^6688459089 is an apocalyptic number.

6688459089 is the 81783-rd square number.

6688459089 is the 40892-nd centered octagonal number.

It is an amenable number.

6688459089 is a deficient number, since it is larger than the sum of its proper divisors (4217176848).

6688459089 is an frugal number, since it uses more digits than its factorization.

6688459089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510 (or 249 counting only the distinct ones).

The product of its (nonzero) digits is 29859840, while the sum is 63.

The cubic root of 6688459089 is about 1884.1205727329.

The spelling of 6688459089 in words is "six billion, six hundred eighty-eight million, four hundred fifty-nine thousand, eighty-nine".