6640442267 has 8 divisors (see below), whose sum is σ = 7057006272. Its totient is φ = 6226761600.

The previous prime is 6640442251. The next prime is 6640442273. The reversal of 6640442267 is 7622440466.

6640442267 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 6640442267 - 2⁴ = 6640442251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6640441267) 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 7 ways as a sum of consecutive naturals, for example, 716084 + ... + 725297.

It is an arithmetic number, because the mean of its divisors is an integer number (882125784).

Almost surely, 2^6640442267 is an apocalyptic number.

6640442267 is a deficient number, since it is larger than the sum of its proper divisors (416564005).

6640442267 is a wasteful number, since it uses less digits than its factorization.

6640442267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1441669.

The product of its (nonzero) digits is 387072, while the sum is 41.

The square root of 6640442267 is about 81488.9088588134. The cubic root of 6640442267 is about 1879.6010043373.

The spelling of 6640442267 in words is "six billion, six hundred forty million, four hundred forty-two thousand, two hundred sixty-seven".