16720552166699 has 2 divisors, whose sum is σ = 16720552166700. Its totient is φ = 16720552166698.

The previous prime is 16720552166663. The next prime is 16720552166761. The reversal of 16720552166699 is 99666125502761.

It is a weak prime.

It is an emirp because it is prime and its reverse (99666125502761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16720552166699 - 2²⁴ = 16720535389483 is a prime.

It is not a weakly prime, because it can be changed into another prime (16720552166629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8360276083349 + 8360276083350.

It is an arithmetic number, because the mean of its divisors is an integer number (8360276083350).

Almost surely, 2^{16720552166699} is an apocalyptic number.

16720552166699 is a deficient number, since it is larger than the sum of its proper divisors (1).

16720552166699 is an equidigital number, since it uses as much as digits as its factorization.

16720552166699 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 73483200, while the sum is 65.

The spelling of 16720552166699 in words is "sixteen trillion, seven hundred twenty billion, five hundred fifty-two million, one hundred sixty-six thousand, six hundred ninety-nine".