27027661 has 2 divisors, whose sum is σ = 27027662. Its totient is φ = 27027660.

The previous prime is 27027659. The next prime is 27027667. The reversal of 27027661 is 16672072.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26842761 + 184900 = 5181^2 + 430^2 .

It is a cyclic number.

It is not a de Polignac number, because 27027661 - 2¹ = 27027659 is a prime.

Together with 27027659, 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 (27027667) 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, 13513830 + 13513831.

It is an arithmetic number, because the mean of its divisors is an integer number (13513831).

Almost surely, 2^27027661 is an apocalyptic number.

It is an amenable number.

27027661 is a deficient number, since it is larger than the sum of its proper divisors (1).

27027661 is an equidigital number, since it uses as much as digits as its factorization.

27027661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 27027661 is about 5198.8134223109. The cubic root of 27027661 is about 300.1024131826.

The spelling of 27027661 in words is "twenty-seven million, twenty-seven thousand, six hundred sixty-one".