6689643384 has 32 divisors (see below), whose sum is σ = 16764048000. Its totient is φ = 2224555872.

The previous prime is 6689643383. The next prime is 6689643397. The reversal of 6689643384 is 4833469866.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6689643383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 322564 + ... + 342675.

It is an arithmetic number, because the mean of its divisors is an integer number (523876500).

Almost surely, 2^6689643384 is an apocalyptic number.

It is an amenable number.

6689643384 is an abundant number, since it is smaller than the sum of its proper divisors (10074404616).

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

6689643384 is a wasteful number, since it uses less digits than its factorization.

6689643384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665667 (or 665663 counting only the distinct ones).

The product of its digits is 17915904, while the sum is 57.

The square root of 6689643384 is about 81790.2401512552. The cubic root of 6689643384 is about 1884.2317703874.

The spelling of 6689643384 in words is "six billion, six hundred eighty-nine million, six hundred forty-three thousand, three hundred eighty-four".