27664427 has 8 divisors (see below), whose sum is σ = 31781856. Its totient is φ = 23588352.

The previous prime is 27664411. The next prime is 27664433. The reversal of 27664427 is 72446672.

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 27664427 - 2⁴ = 27664411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27664027) 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, 8888 + ... + 11589.

It is an arithmetic number, because the mean of its divisors is an integer number (3972732).

Almost surely, 2^27664427 is an apocalyptic number.

27664427 is a deficient number, since it is larger than the sum of its proper divisors (4117429).

27664427 is a wasteful number, since it uses less digits than its factorization.

27664427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20677.

The product of its digits is 112896, while the sum is 38.

The square root of 27664427 is about 5259.6983753824. The cubic root of 27664427 is about 302.4409264698.

The spelling of 27664427 in words is "twenty-seven million, six hundred sixty-four thousand, four hundred twenty-seven".