6681438711 has 64 divisors (see below), whose sum is σ = 10862592000. Its totient is φ = 4043092320.

The previous prime is 6681438707. The next prime is 6681438739. The reversal of 6681438711 is 1178341866.

It is not a de Polignac number, because 6681438711 - 2² = 6681438707 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6681438791) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1635970 + ... + 1640048.

It is an arithmetic number, because the mean of its divisors is an integer number (169728000).

Almost surely, 2^6681438711 is an apocalyptic number.

6681438711 is a deficient number, since it is larger than the sum of its proper divisors (4181153289).

6681438711 is a wasteful number, since it uses less digits than its factorization.

6681438711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4241 (or 4235 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 6681438711 is about 81740.0679654721. The cubic root of 6681438711 is about 1883.4611348850.

The spelling of 6681438711 in words is "six billion, six hundred eighty-one million, four hundred thirty-eight thousand, seven hundred eleven".