27747568664 has 8 divisors (see below), whose sum is σ = 52026691260. Its totient is φ = 13873784328.

The previous prime is 27747568637. The next prime is 27747568679. The reversal of 27747568664 is 46686574772.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 27747568597 and 27747568606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1734223034 + ... + 1734223049.

Almost surely, 2^27747568664 is an apocalyptic number.

It is an amenable number.

27747568664 is a deficient number, since it is larger than the sum of its proper divisors (24279122596).

27747568664 is a wasteful number, since it uses less digits than its factorization.

27747568664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3468446089 (or 3468446085 counting only the distinct ones).

The product of its digits is 94832640, while the sum is 62.

The spelling of 27747568664 in words is "twenty-seven billion, seven hundred forty-seven million, five hundred sixty-eight thousand, six hundred sixty-four".