6881561334 has 32 divisors (see below), whose sum is σ = 15358019040. Its totient is φ = 2284004736.

The previous prime is 6881561333. The next prime is 6881561339. The reversal of 6881561334 is 4331651886.

6881561334 is a `hidden beast` number, since 6 + 8 + 81 + 561 + 3 + 3 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 6881561334.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6881561333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 260887 + ... + 286050.

It is an arithmetic number, because the mean of its divisors is an integer number (479938095).

Almost surely, 2^6881561334 is an apocalyptic number.

6881561334 is an abundant number, since it is smaller than the sum of its proper divisors (8476457706).

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

6881561334 is a wasteful number, since it uses less digits than its factorization.

6881561334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547181 (or 547175 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 6881561334 is about 82955.1766558302. The cubic root of 6881561334 is about 1902.0809457137.

The spelling of 6881561334 in words is "six billion, eight hundred eighty-one million, five hundred sixty-one thousand, three hundred thirty-four".