27066134566 has 4 divisors (see below), whose sum is σ = 40599201852. Its totient is φ = 13533067282.

The previous prime is 27066134561. The next prime is 27066134609. The reversal of 27066134566 is 66543166072.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27066134561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6766533640 + ... + 6766533643.

It is an arithmetic number, because the mean of its divisors is an integer number (10149800463).

Almost surely, 2^27066134566 is an apocalyptic number.

27066134566 is a deficient number, since it is larger than the sum of its proper divisors (13533067286).

27066134566 is a wasteful number, since it uses less digits than its factorization.

27066134566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13533067285.

The product of its (nonzero) digits is 1088640, while the sum is 46.

The spelling of 27066134566 in words is "twenty-seven billion, sixty-six million, one hundred thirty-four thousand, five hundred sixty-six".