27662948221 has 2 divisors, whose sum is σ = 27662948222. Its totient is φ = 27662948220.

The previous prime is 27662948197. The next prime is 27662948273. The reversal of 27662948221 is 12284926672.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25683588121 + 1979360100 = 160261^2 + 44490^2 .

It is a cyclic number.

It is not a de Polignac number, because 27662948221 - 2⁵ = 27662948189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27662949221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13831474110 + 13831474111.

It is an arithmetic number, because the mean of its divisors is an integer number (13831474111).

Almost surely, 2^27662948221 is an apocalyptic number.

It is an amenable number.

27662948221 is a deficient number, since it is larger than the sum of its proper divisors (1).

27662948221 is an equidigital number, since it uses as much as digits as its factorization.

27662948221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1161216, while the sum is 49.

The spelling of 27662948221 in words is "twenty-seven billion, six hundred sixty-two million, nine hundred forty-eight thousand, two hundred twenty-one".