16668503703361 has 2 divisors, whose sum is σ = 16668503703362. Its totient is φ = 16668503703360.

The previous prime is 16668503703317. The next prime is 16668503703389. The reversal of 16668503703361 is 16330730586661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10664509110336 + 6003994593025 = 3265656^2 + 2450305^2 .

It is a cyclic number.

It is not a de Polignac number, because 16668503703361 - 2⁷ = 16668503703233 is a prime.

It is not a weakly prime, because it can be changed into another prime (16668503703311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8334251851680 + 8334251851681.

It is an arithmetic number, because the mean of its divisors is an integer number (8334251851681).

Almost surely, 2^{16668503703361} is an apocalyptic number.

It is an amenable number.

16668503703361 is a deficient number, since it is larger than the sum of its proper divisors (1).

16668503703361 is an equidigital number, since it uses as much as digits as its factorization.

16668503703361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9797760, while the sum is 55.

The spelling of 16668503703361 in words is "sixteen trillion, six hundred sixty-eight billion, five hundred three million, seven hundred three thousand, three hundred sixty-one".