6687718605 has 24 divisors (see below), whose sum is σ = 11602206720. Its totient is φ = 3563656800.

The previous prime is 6687718561. The next prime is 6687718607. The reversal of 6687718605 is 5068177866.

It is not a de Polignac number, because 6687718605 - 2¹⁰ = 6687717581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6687718607) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12765 + ... + 116354.

It is an arithmetic number, because the mean of its divisors is an integer number (483425280).

Almost surely, 2^6687718605 is an apocalyptic number.

It is an amenable number.

6687718605 is a deficient number, since it is larger than the sum of its proper divisors (4914488115).

6687718605 is a wasteful number, since it uses less digits than its factorization.

6687718605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130281 (or 130278 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 54.

The square root of 6687718605 is about 81778.4727480283. The cubic root of 6687718605 is about 1884.0510393965.

The spelling of 6687718605 in words is "six billion, six hundred eighty-seven million, seven hundred eighteen thousand, six hundred five".