13666927541 has 2 divisors, whose sum is σ = 13666927542. Its totient is φ = 13666927540.

The previous prime is 13666927537. The next prime is 13666927559. The reversal of 13666927541 is 14572966631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13301008900 + 365918641 = 115330^2 + 19129^2 .

It is a cyclic number.

It is not a de Polignac number, because 13666927541 - 2² = 13666927537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13666927541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13666920541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6833463770 + 6833463771.

It is an arithmetic number, because the mean of its divisors is an integer number (6833463771).

Almost surely, 2^13666927541 is an apocalyptic number.

It is an amenable number.

13666927541 is a deficient number, since it is larger than the sum of its proper divisors (1).

13666927541 is an equidigital number, since it uses as much as digits as its factorization.

13666927541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1632960, while the sum is 50.

The spelling of 13666927541 in words is "thirteen billion, six hundred sixty-six million, nine hundred twenty-seven thousand, five hundred forty-one".