27664033 has 4 divisors (see below), whose sum is σ = 27676180. Its totient is φ = 27651888.

The previous prime is 27664027. The next prime is 27664037. The reversal of 27664033 is 33046672.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 13010449 + 14653584 = 3607^2 + 3828^2 .

It is a 3-Lehmer number, since φ(27664033) divides (27664033-1)³.

It is a cyclic number.

It is not a de Polignac number, because 27664033 - 2¹³ = 27655841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27663986 and 27664004.

It is not an unprimeable number, because it can be changed into a prime (27664037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1518 + ... + 7591.

It is an arithmetic number, because the mean of its divisors is an integer number (6919045).

It is a Poulet number, since it divides 2^27664032-1.

Almost surely, 2^27664033 is an apocalyptic number.

27664033 is the 3037-th octagonal number.

It is an amenable number.

27664033 is a deficient number, since it is larger than the sum of its proper divisors (12147).

27664033 is an equidigital number, since it uses as much as digits as its factorization.

27664033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12146.

The product of its (nonzero) digits is 18144, while the sum is 31.

The square root of 27664033 is about 5259.6609206298. The cubic root of 27664033 is about 302.4394906633.

The spelling of 27664033 in words is "twenty-seven million, six hundred sixty-four thousand, thirty-three".