6639014071 has 4 divisors (see below), whose sum is σ = 6660639832. Its totient is φ = 6617388312.

The previous prime is 6639014021. The next prime is 6639014077. The reversal of 6639014071 is 1704109366.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6639014071 - 2⁷ = 6639013943 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6639014071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6639014077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10812420 + ... + 10813033.

It is an arithmetic number, because the mean of its divisors is an integer number (1665159958).

Almost surely, 2^6639014071 is an apocalyptic number.

6639014071 is a deficient number, since it is larger than the sum of its proper divisors (21625761).

6639014071 is a wasteful number, since it uses less digits than its factorization.

6639014071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21625760.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 6639014071 is about 81480.1452563752. The cubic root of 6639014071 is about 1879.4662426752.

The spelling of 6639014071 in words is "six billion, six hundred thirty-nine million, fourteen thousand, seventy-one".