166126111 has 2 divisors, whose sum is σ = 166126112. Its totient is φ = 166126110.

The previous prime is 166126097. The next prime is 166126127. The reversal of 166126111 is 111621661.

It is a weak prime.

It is an emirp because it is prime and its reverse (111621661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166126111 - 2⁹ = 166125599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166126211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83063055 + 83063056.

It is an arithmetic number, because the mean of its divisors is an integer number (83063056).

Almost surely, 2^166126111 is an apocalyptic number.

166126111 is a deficient number, since it is larger than the sum of its proper divisors (1).

166126111 is an equidigital number, since it uses as much as digits as its factorization.

166126111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 25.

The square root of 166126111 is about 12888.9918535159. The cubic root of 166126111 is about 549.7256052761.

Adding to 166126111 its reverse (111621661), we get a palindrome (277747772).

It can be divided in two parts, 1661 and 26111, that added together give a palindrome (27772).

The spelling of 166126111 in words is "one hundred sixty-six million, one hundred twenty-six thousand, one hundred eleven".