27665641207 has 4 divisors (see below), whose sum is σ = 28134550440. Its totient is φ = 27196731976.

The previous prime is 27665641193. The next prime is 27665641247. The reversal of 27665641207 is 70214656672.

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 27665641207 - 2¹¹ = 27665639159 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 (27665641247) 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, 234454528 + ... + 234454645.

It is an arithmetic number, because the mean of its divisors is an integer number (7033637610).

Almost surely, 2^27665641207 is an apocalyptic number.

27665641207 is a deficient number, since it is larger than the sum of its proper divisors (468909233).

27665641207 is an equidigital number, since it uses as much as digits as its factorization.

27665641207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468909232.

The product of its (nonzero) digits is 846720, while the sum is 46.

The spelling of 27665641207 in words is "twenty-seven billion, six hundred sixty-five million, six hundred forty-one thousand, two hundred seven".