27552661 has 2 divisors, whose sum is σ = 27552662. Its totient is φ = 27552660.

The previous prime is 27552659. The next prime is 27552671. The reversal of 27552661 is 16625572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20295025 + 7257636 = 4505^2 + 2694^2 .

It is a cyclic number.

It is not a de Polignac number, because 27552661 - 2¹ = 27552659 is a prime.

Together with 27552659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27552601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13776330 + 13776331.

It is an arithmetic number, because the mean of its divisors is an integer number (13776331).

Almost surely, 2^27552661 is an apocalyptic number.

It is an amenable number.

27552661 is a deficient number, since it is larger than the sum of its proper divisors (1).

27552661 is an equidigital number, since it uses as much as digits as its factorization.

27552661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 34.

The square root of 27552661 is about 5249.0628687414. The cubic root of 27552661 is about 302.0330833748.

The spelling of 27552661 in words is "twenty-seven million, five hundred fifty-two thousand, six hundred sixty-one".