27130666655 has 4 divisors (see below), whose sum is σ = 32556799992. Its totient is φ = 21704533320.

The previous prime is 27130666643. The next prime is 27130666697. The reversal of 27130666655 is 55666603172.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 27130666655 - 2¹⁴ = 27130650271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 2713066661 + ... + 2713066670.

It is an arithmetic number, because the mean of its divisors is an integer number (8139199998).

Almost surely, 2^27130666655 is an apocalyptic number.

27130666655 is a deficient number, since it is larger than the sum of its proper divisors (5426133337).

27130666655 is an equidigital number, since it uses as much as digits as its factorization.

27130666655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5426133336.

The product of its (nonzero) digits is 1360800, while the sum is 47.

The spelling of 27130666655 in words is "twenty-seven billion, one hundred thirty million, six hundred sixty-six thousand, six hundred fifty-five".