27066475665 has 12 divisors (see below), whose sum is σ = 46915224564. Its totient is φ = 14435453664.

The previous prime is 27066475661. The next prime is 27066475673. The reversal of 27066475665 is 56657466072.

27066475665 is a `hidden beast` number, since 2 + 70 + 6 + 6 + 4 + 7 + 566 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18065779281 + 9000696384 = 134409^2 + 94872^2 .

It is not a de Polignac number, because 27066475665 - 2² = 27066475661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27066475661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 300738574 + ... + 300738663.

It is an arithmetic number, because the mean of its divisors is an integer number (3909602047).

Almost surely, 2^27066475665 is an apocalyptic number.

It is an amenable number.

27066475665 is a deficient number, since it is larger than the sum of its proper divisors (19848748899).

27066475665 is a wasteful number, since it uses less digits than its factorization.

27066475665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601477248 (or 601477245 counting only the distinct ones).

The product of its (nonzero) digits is 12700800, while the sum is 54.

The spelling of 27066475665 in words is "twenty-seven billion, sixty-six million, four hundred seventy-five thousand, six hundred sixty-five".