6681090486 has 64 divisors (see below), whose sum is σ = 15631626240. Its totient is φ = 1864319520.

The previous prime is 6681090433. The next prime is 6681090529. The reversal of 6681090486 is 6840901866.

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, 308605 + ... + 329543.

It is an arithmetic number, because the mean of its divisors is an integer number (244244160).

Almost surely, 2^6681090486 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6681090486, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7815813120).

6681090486 is an abundant number, since it is smaller than the sum of its proper divisors (8950535754).

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

6681090486 is a wasteful number, since it uses less digits than its factorization.

6681090486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21129.

The product of its (nonzero) digits is 497664, while the sum is 48.

The square root of 6681090486 is about 81737.9378624149. The cubic root of 6681090486 is about 1883.4284134071.

The spelling of 6681090486 in words is "six billion, six hundred eighty-one million, ninety thousand, four hundred eighty-six".