6640143227 has 4 divisors (see below), whose sum is σ = 6748998096. Its totient is φ = 6531288360.

The previous prime is 6640143179. The next prime is 6640143269. The reversal of 6640143227 is 7223410466.

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 6640143227 - 2³⁰ = 5566401403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6640173227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54427343 + ... + 54427464.

It is an arithmetic number, because the mean of its divisors is an integer number (1687249524).

Almost surely, 2^6640143227 is an apocalyptic number.

6640143227 is a deficient number, since it is larger than the sum of its proper divisors (108854869).

6640143227 is a wasteful number, since it uses less digits than its factorization.

6640143227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108854868.

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 6640143227 is about 81487.0739872282. The cubic root of 6640143227 is about 1879.5727891322.

The spelling of 6640143227 in words is "six billion, six hundred forty million, one hundred forty-three thousand, two hundred twenty-seven".