16566360330423 has 4 divisors (see below), whose sum is σ = 22088480440568. Its totient is φ = 11044240220280.

The previous prime is 16566360330409. The next prime is 16566360330427. The reversal of 16566360330423 is 32403306366561.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-16566360330423 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 (16566360330427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2761060055068 + ... + 2761060055073.

It is an arithmetic number, because the mean of its divisors is an integer number (5522120110142).

Almost surely, 2^{16566360330423} is an apocalyptic number.

16566360330423 is a deficient number, since it is larger than the sum of its proper divisors (5522120110145).

16566360330423 is an equidigital number, since it uses as much as digits as its factorization.

16566360330423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5522120110144.

The product of its (nonzero) digits is 4199040, while the sum is 48.

Adding to 16566360330423 its reverse (32403306366561), we get a palindrome (48969666696984).

The spelling of 16566360330423 in words is "sixteen trillion, five hundred sixty-six billion, three hundred sixty million, three hundred thirty thousand, four hundred twenty-three".