16671316637 has 2 divisors, whose sum is σ = 16671316638. Its totient is φ = 16671316636.

The previous prime is 16671316603. The next prime is 16671316709. The reversal of 16671316637 is 73661317661.

It is a happy number.

16671316637 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13212582916 + 3458733721 = 114946^2 + 58811^2 .

It is a cyclic number.

It is not a de Polignac number, because 16671316637 - 2¹⁸ = 16671054493 is a prime.

It is a super-2 number, since 2×16671316637² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16671316591 and 16671316600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16671376637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8335658318 + 8335658319.

It is an arithmetic number, because the mean of its divisors is an integer number (8335658319).

Almost surely, 2^16671316637 is an apocalyptic number.

It is an amenable number.

16671316637 is a deficient number, since it is larger than the sum of its proper divisors (1).

16671316637 is an equidigital number, since it uses as much as digits as its factorization.

16671316637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 571536, while the sum is 47.

The spelling of 16671316637 in words is "sixteen billion, six hundred seventy-one million, three hundred sixteen thousand, six hundred thirty-seven".