6684871992 has 128 divisors (see below), whose sum is σ = 18651494400. Its totient is φ = 1987545600.

The previous prime is 6684871943. The next prime is 6684872083. The reversal of 6684871992 is 2991784866.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 516642 + ... + 529422.

It is an arithmetic number, because the mean of its divisors is an integer number (145714800).

Almost surely, 2^6684871992 is an apocalyptic number.

6684871992 is a gapful number since it is divisible by the number (62) 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 6684871992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9325747200).

6684871992 is an abundant number, since it is smaller than the sum of its proper divisors (11966622408).

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

6684871992 is a wasteful number, since it uses less digits than its factorization.

6684871992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12877 (or 12873 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 60.

The square root of 6684871992 is about 81761.0664803242. The cubic root of 6684871992 is about 1883.7836873732.

The spelling of 6684871992 in words is "six billion, six hundred eighty-four million, eight hundred seventy-one thousand, nine hundred ninety-two".