27660891 has 8 divisors (see below), whose sum is σ = 37226304. Its totient is φ = 18268040.

The previous prime is 27660869. The next prime is 27660901. The reversal of 27660891 is 19806672.

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 27660891 - 2¹¹ = 27658843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27660851) 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, 42765 + ... + 43406.

It is an arithmetic number, because the mean of its divisors is an integer number (4653288).

Almost surely, 2^27660891 is an apocalyptic number.

27660891 is a deficient number, since it is larger than the sum of its proper divisors (9565413).

27660891 is a wasteful number, since it uses less digits than its factorization.

27660891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86281.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 27660891 is about 5259.3622236921. The cubic root of 27660891 is about 302.4280401653.

The spelling of 27660891 in words is "twenty-seven million, six hundred sixty thousand, eight hundred ninety-one".