16566350563423 has 4 divisors (see below), whose sum is σ = 16566358710280. Its totient is φ = 16566342416568.

The previous prime is 16566350563409. The next prime is 16566350563439. The reversal of 16566350563423 is 32436505366561.

16566350563423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16566350563423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16566350563403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1792693 + ... + 6028801.

It is an arithmetic number, because the mean of its divisors is an integer number (4141589677570).

Almost surely, 2^{16566350563423} is an apocalyptic number.

16566350563423 is a deficient number, since it is larger than the sum of its proper divisors (8146857).

16566350563423 is an equidigital number, since it uses as much as digits as its factorization.

16566350563423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8146856.

The product of its (nonzero) digits is 34992000, while the sum is 55.

The spelling of 16566350563423 in words is "sixteen trillion, five hundred sixty-six billion, three hundred fifty million, five hundred sixty-three thousand, four hundred twenty-three".