6686511611 has 12 divisors (see below), whose sum is σ = 7233993648. Its totient is φ = 6143892624.

The previous prime is 6686511589. The next prime is 6686511679. The reversal of 6686511611 is 1161156866.

It is not a de Polignac number, because 6686511611 - 2⁶ = 6686511547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6686511511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 641306 + ... + 651648.

It is an arithmetic number, because the mean of its divisors is an integer number (602832804).

Almost surely, 2^6686511611 is an apocalyptic number.

6686511611 is a deficient number, since it is larger than the sum of its proper divisors (547482037).

6686511611 is a wasteful number, since it uses less digits than its factorization.

6686511611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10802 (or 10579 counting only the distinct ones).

The product of its digits is 51840, while the sum is 41.

The square root of 6686511611 is about 81771.0927589940. The cubic root of 6686511611 is about 1883.9376885787.

The spelling of 6686511611 in words is "six billion, six hundred eighty-six million, five hundred eleven thousand, six hundred eleven".