6689728152018 has 64 divisors (see below), whose sum is σ = 15048257280000. Its totient is φ = 2202741419472.

The previous prime is 6689728152017. The next prime is 6689728152047. The reversal of 6689728152018 is 8102518279866.

6689728152018 is a `hidden beast` number, since 6 + 6 + 8 + 97 + 2 + 8 + 1 + 520 + 18 = 666.

It is a super-3 number, since 3×6689728152018³ (a number of 39 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (6689728152017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 745630 + ... + 3733017.

It is an arithmetic number, because the mean of its divisors is an integer number (235129020000).

Almost surely, 2^{6689728152018} is an apocalyptic number.

6689728152018 is an abundant number, since it is smaller than the sum of its proper divisors (8358529127982).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6689728152018 is a wasteful number, since it uses less digits than its factorization.

6689728152018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4478996 (or 4478990 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 63.

The spelling of 6689728152018 in words is "six trillion, six hundred eighty-nine billion, seven hundred twenty-eight million, one hundred fifty-two thousand, eighteen".