27822661 has 2 divisors, whose sum is σ = 27822662. Its totient is φ = 27822660.

The previous prime is 27822647. The next prime is 27822667. The reversal of 27822661 is 16622872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26368225 + 1454436 = 5135^2 + 1206^2 .

It is a cyclic number.

It is not a de Polignac number, because 27822661 - 2⁷ = 27822533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27822667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13911330 + 13911331.

It is an arithmetic number, because the mean of its divisors is an integer number (13911331).

Almost surely, 2^27822661 is an apocalyptic number.

It is an amenable number.

27822661 is a deficient number, since it is larger than the sum of its proper divisors (1).

27822661 is an equidigital number, since it uses as much as digits as its factorization.

27822661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 34.

The square root of 27822661 is about 5274.7190446506. The cubic root of 27822661 is about 303.0164608179.

The spelling of 27822661 in words is "twenty-seven million, eight hundred twenty-two thousand, six hundred sixty-one".