16566021107 has 2 divisors, whose sum is σ = 16566021108. Its totient is φ = 16566021106.

The previous prime is 16566021049. The next prime is 16566021113. The reversal of 16566021107 is 70112066561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16566021107 - 2¹² = 16566017011 is a prime.

It is not a weakly prime, because it can be changed into another prime (16566021007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8283010553 + 8283010554.

It is an arithmetic number, because the mean of its divisors is an integer number (8283010554).

Almost surely, 2^16566021107 is an apocalyptic number.

16566021107 is a deficient number, since it is larger than the sum of its proper divisors (1).

16566021107 is an equidigital number, since it uses as much as digits as its factorization.

16566021107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 35.

Adding to 16566021107 its reverse (70112066561), we get a palindrome (86678087668).

The spelling of 16566021107 in words is "sixteen billion, five hundred sixty-six million, twenty-one thousand, one hundred seven".