6671256065 has 8 divisors (see below), whose sum is σ = 8026972008. Its totient is φ = 5322695040.

The previous prime is 6671256043. The next prime is 6671256071. The reversal of 6671256065 is 5606521766.

It can be written as a sum of positive squares in 4 ways, for example, as 1615477249 + 5055778816 = 40193^2 + 71104^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-6671256065 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1786676 + ... + 1790405.

It is an arithmetic number, because the mean of its divisors is an integer number (1003371501).

Almost surely, 2^6671256065 is an apocalyptic number.

It is an amenable number.

6671256065 is a deficient number, since it is larger than the sum of its proper divisors (1355715943).

6671256065 is a wasteful number, since it uses less digits than its factorization.

6671256065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3577459.

The product of its (nonzero) digits is 453600, while the sum is 44.

The square root of 6671256065 is about 81677.7574679912. The cubic root of 6671256065 is about 1882.5038376150.

The spelling of 6671256065 in words is "six billion, six hundred seventy-one million, two hundred fifty-six thousand, sixty-five".