16666622166127 has 2 divisors, whose sum is σ = 16666622166128. Its totient is φ = 16666622166126.

The previous prime is 16666622166091. The next prime is 16666622166143. The reversal of 16666622166127 is 72166122666661.

It is a strong prime.

It is an emirp because it is prime and its reverse (72166122666661) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16666622166127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16666629166127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8333311083063 + 8333311083064.

It is an arithmetic number, because the mean of its divisors is an integer number (8333311083064).

Almost surely, 2^{16666622166127} is an apocalyptic number.

16666622166127 is a deficient number, since it is larger than the sum of its proper divisors (1).

16666622166127 is an equidigital number, since it uses as much as digits as its factorization.

16666622166127 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15676416, while the sum is 58.

The spelling of 16666622166127 in words is "sixteen trillion, six hundred sixty-six billion, six hundred twenty-two million, one hundred sixty-six thousand, one hundred twenty-seven".