6645271327 has 4 divisors (see below), whose sum is σ = 6658917136. Its totient is φ = 6631625520.

The previous prime is 6645271309. The next prime is 6645271357. The reversal of 6645271327 is 7231725466.

6645271327 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 6645271327 - 2¹⁵ = 6645238559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6645271357) 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 3 ways as a sum of consecutive naturals, for example, 6822174 + ... + 6823147.

It is an arithmetic number, because the mean of its divisors is an integer number (1664729284).

Almost surely, 2^6645271327 is an apocalyptic number.

6645271327 is a deficient number, since it is larger than the sum of its proper divisors (13645809).

6645271327 is a wasteful number, since it uses less digits than its factorization.

6645271327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13645808.

The product of its digits is 423360, while the sum is 43.

The square root of 6645271327 is about 81518.5336411297. The cubic root of 6645271327 is about 1880.0565215201.

The spelling of 6645271327 in words is "six billion, six hundred forty-five million, two hundred seventy-one thousand, three hundred twenty-seven".