27766206091 has 4 divisors (see below), whose sum is σ = 29902068112. Its totient is φ = 25630344072.

The previous prime is 27766206067. The next prime is 27766206113. The reversal of 27766206091 is 19060266772.

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 27766206091 - 2¹¹ = 27766204043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27766206991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1067930991 + ... + 1067931016.

It is an arithmetic number, because the mean of its divisors is an integer number (7475517028).

Almost surely, 2^27766206091 is an apocalyptic number.

27766206091 is a deficient number, since it is larger than the sum of its proper divisors (2135862021).

27766206091 is a wasteful number, since it uses less digits than its factorization.

27766206091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2135862020.

The product of its (nonzero) digits is 381024, while the sum is 46.

The spelling of 27766206091 in words is "twenty-seven billion, seven hundred sixty-six million, two hundred six thousand, ninety-one".