27666571741 has 2 divisors, whose sum is σ = 27666571742. Its totient is φ = 27666571740.

The previous prime is 27666571727. The next prime is 27666571763. The reversal of 27666571741 is 14717566672.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13913146116 + 13753425625 = 117954^2 + 117275^2 .

It is a cyclic number.

It is not a de Polignac number, because 27666571741 - 2²⁵ = 27633017309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27666571241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13833285870 + 13833285871.

It is an arithmetic number, because the mean of its divisors is an integer number (13833285871).

Almost surely, 2^27666571741 is an apocalyptic number.

It is an amenable number.

27666571741 is a deficient number, since it is larger than the sum of its proper divisors (1).

27666571741 is an equidigital number, since it uses as much as digits as its factorization.

27666571741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2963520, while the sum is 52.

The spelling of 27666571741 in words is "twenty-seven billion, six hundred sixty-six million, five hundred seventy-one thousand, seven hundred forty-one".