16005605066501 has 2 divisors, whose sum is σ = 16005605066502. Its totient is φ = 16005605066500.

The previous prime is 16005605066459. The next prime is 16005605066509. The reversal of 16005605066501 is 10566050650061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12619361035876 + 3386244030625 = 3552374^2 + 1840175^2 .

It is an emirp because it is prime and its reverse (10566050650061) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16005605066501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16005605066509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8002802533250 + 8002802533251.

It is an arithmetic number, because the mean of its divisors is an integer number (8002802533251).

Almost surely, 2^{16005605066501} is an apocalyptic number.

It is an amenable number.

16005605066501 is a deficient number, since it is larger than the sum of its proper divisors (1).

16005605066501 is an equidigital number, since it uses as much as digits as its factorization.

16005605066501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162000, while the sum is 41.

The spelling of 16005605066501 in words is "sixteen trillion, five billion, six hundred five million, sixty-six thousand, five hundred one".