16665520012541 has 12 divisors (see below), whose sum is σ = 17589249608832. Its totient is φ = 15787999521864.

The previous prime is 16665520012517. The next prime is 16665520012543. The reversal of 16665520012541 is 14521002556661.

It is a de Polignac number, because none of the positive numbers 2^k-16665520012541 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16665520012492 and 16665520012501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16665520012543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14718260 + ... + 15810066.

It is an arithmetic number, because the mean of its divisors is an integer number (1465770800736).

Almost surely, 2^{16665520012541} is an apocalyptic number.

It is an amenable number.

16665520012541 is a deficient number, since it is larger than the sum of its proper divisors (923729596291).

16665520012541 is a wasteful number, since it uses less digits than its factorization.

16665520012541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134128 (or 1134109 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 44.

The spelling of 16665520012541 in words is "sixteen trillion, six hundred sixty-five billion, five hundred twenty million, twelve thousand, five hundred forty-one".