27667640443 has 4 divisors (see below), whose sum is σ = 28621697040. Its totient is φ = 26713583848.

The previous prime is 27667640423. The next prime is 27667640477. The reversal of 27667640443 is 34404676672.

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 27667640443 - 2³³ = 19077705851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27667640423) 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, 477028255 + ... + 477028312.

It is an arithmetic number, because the mean of its divisors is an integer number (7155424260).

Almost surely, 2^27667640443 is an apocalyptic number.

27667640443 is a deficient number, since it is larger than the sum of its proper divisors (954056597).

27667640443 is an equidigital number, since it uses as much as digits as its factorization.

27667640443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954056596.

The product of its (nonzero) digits is 4064256, while the sum is 49.

The spelling of 27667640443 in words is "twenty-seven billion, six hundred sixty-seven million, six hundred forty thousand, four hundred forty-three".