27660005 has 8 divisors (see below), whose sum is σ = 33360000. Its totient is φ = 22016016.

The previous prime is 27660001. The next prime is 27660019. The reversal of 27660005 is 50006672.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27660005 - 2² = 27660001 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27660001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12905 + ... + 14894.

It is an arithmetic number, because the mean of its divisors is an integer number (4170000).

Almost surely, 2^27660005 is an apocalyptic number.

It is an amenable number.

27660005 is a deficient number, since it is larger than the sum of its proper divisors (5699995).

27660005 is a wasteful number, since it uses less digits than its factorization.

27660005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28003.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 27660005 is about 5259.2779922723. The cubic root of 27660005 is about 302.4248111285.

Adding to 27660005 its reverse (50006672), we get a palindrome (77666677).

The spelling of 27660005 in words is "twenty-seven million, six hundred sixty thousand, five".