6681334668 has 48 divisors (see below), whose sum is σ = 16041674880. Its totient is φ = 2163135744.

The previous prime is 6681334663. The next prime is 6681334669. The reversal of 6681334668 is 8664331866.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 6681334668.

It is not an unprimeable number, because it can be changed into a prime (6681334663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56196 + ... + 128532.

It is an arithmetic number, because the mean of its divisors is an integer number (334201560).

Almost surely, 2^6681334668 is an apocalyptic number.

It is an amenable number.

6681334668 is an abundant number, since it is smaller than the sum of its proper divisors (9360340212).

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

6681334668 is a wasteful number, since it uses less digits than its factorization.

6681334668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72566 (or 72564 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 51.

The square root of 6681334668 is about 81739.4315370495. The cubic root of 6681334668 is about 1883.4513584495.

The spelling of 6681334668 in words is "six billion, six hundred eighty-one million, three hundred thirty-four thousand, six hundred sixty-eight".