6681071849 has 8 divisors (see below), whose sum is σ = 6714521352. Its totient is φ = 6647695360.

The previous prime is 6681071807. The next prime is 6681071863. The reversal of 6681071849 is 9481701866.

It can be written as a sum of positive squares in 4 ways, for example, as 2887127824 + 3793944025 = 53732^2 + 61595^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6681071849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6681071797 and 6681071806.

It is not an unprimeable number, because it can be changed into a prime (6681071879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170027 + ... + 205599.

It is an arithmetic number, because the mean of its divisors is an integer number (839315169).

Almost surely, 2^6681071849 is an apocalyptic number.

It is an amenable number.

6681071849 is a deficient number, since it is larger than the sum of its proper divisors (33449503).

6681071849 is a wasteful number, since it uses less digits than its factorization.

6681071849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36507.

The product of its (nonzero) digits is 580608, while the sum is 50.

The square root of 6681071849 is about 81737.8238577465. The cubic root of 6681071849 is about 1883.4266621217.

The spelling of 6681071849 in words is "six billion, six hundred eighty-one million, seventy-one thousand, eight hundred forty-nine".