27665005 has 8 divisors (see below), whose sum is σ = 33306624. Its totient is φ = 22059600.

The previous prime is 27665003. The next prime is 27665023. The reversal of 27665005 is 50056672.

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

It is not a de Polignac number, because 27665005 - 2¹ = 27665003 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 (27665003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7341 + ... + 10450.

It is an arithmetic number, because the mean of its divisors is an integer number (4163328).

Almost surely, 2^27665005 is an apocalyptic number.

It is an amenable number.

27665005 is a deficient number, since it is larger than the sum of its proper divisors (5641619).

27665005 is a wasteful number, since it uses less digits than its factorization.

27665005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18107.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 27665005 is about 5259.7533212119. The cubic root of 27665005 is about 302.4430327805.

The spelling of 27665005 in words is "twenty-seven million, six hundred sixty-five thousand, five".