27664073677 has 4 divisors (see below), whose sum is σ = 27701307360. Its totient is φ = 27626839996.

The previous prime is 27664073651. The next prime is 27664073681. The reversal of 27664073677 is 77637046672.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27664073677 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 (27664073627) 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, 18615727 + ... + 18617212.

It is an arithmetic number, because the mean of its divisors is an integer number (6925326840).

Almost surely, 2^27664073677 is an apocalyptic number.

It is an amenable number.

27664073677 is a deficient number, since it is larger than the sum of its proper divisors (37233683).

27664073677 is an equidigital number, since it uses as much as digits as its factorization.

27664073677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37233682.

The product of its (nonzero) digits is 12446784, while the sum is 55.

The spelling of 27664073677 in words is "twenty-seven billion, six hundred sixty-four million, seventy-three thousand, six hundred seventy-seven".