16661130543063 has 24 divisors (see below), whose sum is σ = 24338095563600. Its totient is φ = 10981890082944.

The previous prime is 16661130543053. The next prime is 16661130543097. The reversal of 16661130543063 is 36034503116661.

It is not a de Polignac number, because 16661130543063 - 2²¹ = 16661128445911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16661130543023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11540881 + ... + 12904037.

It is an arithmetic number, because the mean of its divisors is an integer number (1014087315150).

Almost surely, 2^{16661130543063} is an apocalyptic number.

16661130543063 is a deficient number, since it is larger than the sum of its proper divisors (7676965020537).

16661130543063 is a wasteful number, since it uses less digits than its factorization.

16661130543063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1378511 (or 1378508 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 45.

The spelling of 16661130543063 in words is "sixteen trillion, six hundred sixty-one billion, one hundred thirty million, five hundred forty-three thousand, sixty-three".