27766388901 has 4 divisors (see below), whose sum is σ = 37021851872. Its totient is φ = 18510925932.

The previous prime is 27766388887. The next prime is 27766388927. The reversal of 27766388901 is 10988366772.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 27766388901 - 2⁵ = 27766388869 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 (27766383901) 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, 4627731481 + ... + 4627731486.

It is an arithmetic number, because the mean of its divisors is an integer number (9255462968).

Almost surely, 2^27766388901 is an apocalyptic number.

It is an amenable number.

27766388901 is a deficient number, since it is larger than the sum of its proper divisors (9255462971).

27766388901 is an equidigital number, since it uses as much as digits as its factorization.

27766388901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9255462970.

The product of its (nonzero) digits is 6096384, while the sum is 57.

The spelling of 27766388901 in words is "twenty-seven billion, seven hundred sixty-six million, three hundred eighty-eight thousand, nine hundred one".