16666700317 has 2 divisors, whose sum is σ = 16666700318. Its totient is φ = 16666700316.

The previous prime is 16666700293. The next prime is 16666700371. The reversal of 16666700317 is 71300766661.

Together with next prime (16666700371) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12860920836 + 3805779481 = 113406^2 + 61691^2 .

It is a cyclic number.

It is not a de Polignac number, because 16666700317 - 2³¹ = 14519216669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16666706317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8333350158 + 8333350159.

It is an arithmetic number, because the mean of its divisors is an integer number (8333350159).

Almost surely, 2^16666700317 is an apocalyptic number.

It is an amenable number.

16666700317 is a deficient number, since it is larger than the sum of its proper divisors (1).

16666700317 is an equidigital number, since it uses as much as digits as its factorization.

16666700317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 43.

The spelling of 16666700317 in words is "sixteen billion, six hundred sixty-six million, seven hundred thousand, three hundred seventeen".