27661877686 has 16 divisors (see below), whose sum is σ = 41677571520. Its totient is φ = 13769385280.

The previous prime is 27661877627. The next prime is 27661877687. The reversal of 27661877686 is 68677816672.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27661877687) 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 7 ways as a sum of consecutive naturals, for example, 3014946 + ... + 3024106.

It is an arithmetic number, because the mean of its divisors is an integer number (2604848220).

Almost surely, 2^27661877686 is an apocalyptic number.

27661877686 is a deficient number, since it is larger than the sum of its proper divisors (14015693834).

27661877686 is a wasteful number, since it uses less digits than its factorization.

27661877686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15719.

The product of its digits is 56899584, while the sum is 64.

The spelling of 27661877686 in words is "twenty-seven billion, six hundred sixty-one million, eight hundred seventy-seven thousand, six hundred eighty-six".