16660255065541 has 2 divisors, whose sum is σ = 16660255065542. Its totient is φ = 16660255065540.

The previous prime is 16660255065527. The next prime is 16660255065583. The reversal of 16660255065541 is 14556055206661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16399900003041 + 260355062500 = 4049679^2 + 510250^2 .

It is a cyclic number.

It is not a de Polignac number, because 16660255065541 - 2⁹ = 16660255065029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16660255060541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8330127532770 + 8330127532771.

It is an arithmetic number, because the mean of its divisors is an integer number (8330127532771).

Almost surely, 2^{16660255065541} is an apocalyptic number.

It is an amenable number.

16660255065541 is a deficient number, since it is larger than the sum of its proper divisors (1).

16660255065541 is an equidigital number, since it uses as much as digits as its factorization.

16660255065541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480000, while the sum is 52.

The spelling of 16660255065541 in words is "sixteen trillion, six hundred sixty billion, two hundred fifty-five million, sixty-five thousand, five hundred forty-one".