27669 has 8 divisors (see below), whose sum is σ = 38592. Its totient is φ = 17600.

The previous prime is 27653. The next prime is 27673. The reversal of 27669 is 96672.

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 27669 - 2⁴ = 27653 is a prime.

It is a super-2 number, since 2×27669² = 1531147122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132 + ... + 269.

It is an arithmetic number, because the mean of its divisors is an integer number (4824).

2²⁷⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

27669 is a deficient number, since it is larger than the sum of its proper divisors (10923).

27669 is a wasteful number, since it uses less digits than its factorization.

27669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427.

The product of its digits is 4536, while the sum is 30.

The square root of 27669 is about 166.3400132259. The cubic root of 27669 is about 30.2457590303.

It can be divided in two parts, 2766 and 9, that added together give a triangular number (2775 = T₇₄).

The spelling of 27669 in words is "twenty-seven thousand, six hundred sixty-nine".