6688601984 has 64 divisors (see below), whose sum is σ = 13530108240. Its totient is φ = 3293208576.

The previous prime is 6688601981. The next prime is 6688601987. The reversal of 6688601984 is 4891068866.

It is an interprime number because it is at equal distance from previous prime (6688601981) and next prime (6688601987).

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6688601981) 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, 2356214 + ... + 2359050.

Almost surely, 2^6688601984 is an apocalyptic number.

6688601984 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6688601984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6765054120).

6688601984 is an abundant number, since it is smaller than the sum of its proper divisors (6841506256).

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

6688601984 is a wasteful number, since it uses less digits than its factorization.

6688601984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3127 (or 3115 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 56.

The square root of 6688601984 is about 81783.8736182140. The cubic root of 6688601984 is about 1884.1339903472.

The spelling of 6688601984 in words is "six billion, six hundred eighty-eight million, six hundred one thousand, nine hundred eighty-four".