27665706867 has 16 divisors (see below), whose sum is σ = 38887698432. Its totient is φ = 17469077760.

The previous prime is 27665706821. The next prime is 27665706889. The reversal of 27665706867 is 76860756672.

It is not a de Polignac number, because 27665706867 - 2¹⁰ = 27665705843 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27665706867.

It is not an unprimeable number, because it can be changed into a prime (27665701867) 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 15 ways as a sum of consecutive naturals, for example, 3160318 + ... + 3169059.

It is an arithmetic number, because the mean of its divisors is an integer number (2430481152).

Almost surely, 2^27665706867 is an apocalyptic number.

27665706867 is a deficient number, since it is larger than the sum of its proper divisors (11221991565).

27665706867 is a wasteful number, since it uses less digits than its factorization.

27665706867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6329458.

The product of its (nonzero) digits is 35562240, while the sum is 60.

The spelling of 27665706867 in words is "twenty-seven billion, six hundred sixty-five million, seven hundred six thousand, eight hundred sixty-seven".