16668271313 has 2 divisors, whose sum is σ = 16668271314. Its totient is φ = 16668271312.

The previous prime is 16668271309. The next prime is 16668271339. The reversal of 16668271313 is 31317286661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15738204304 + 930067009 = 125452^2 + 30497^2 .

It is a cyclic number.

It is not a de Polignac number, because 16668271313 - 2² = 16668271309 is a prime.

It is not a weakly prime, because it can be changed into another prime (16668271343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8334135656 + 8334135657.

It is an arithmetic number, because the mean of its divisors is an integer number (8334135657).

Almost surely, 2^16668271313 is an apocalyptic number.

It is an amenable number.

16668271313 is a deficient number, since it is larger than the sum of its proper divisors (1).

16668271313 is an equidigital number, since it uses as much as digits as its factorization.

16668271313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 44.

The spelling of 16668271313 in words is "sixteen billion, six hundred sixty-eight million, two hundred seventy-one thousand, three hundred thirteen".