166100026133 has 2 divisors, whose sum is σ = 166100026134. Its totient is φ = 166100026132.

The previous prime is 166100026111. The next prime is 166100026229. The reversal of 166100026133 is 331620001661.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119434521649 + 46665504484 = 345593^2 + 216022^2 .

It is a cyclic number.

It is not a de Polignac number, because 166100026133 - 2¹⁶ = 166099960597 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166100026096 and 166100026105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166100026933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83050013066 + 83050013067.

It is an arithmetic number, because the mean of its divisors is an integer number (83050013067).

Almost surely, 2^166100026133 is an apocalyptic number.

It is an amenable number.

166100026133 is a deficient number, since it is larger than the sum of its proper divisors (1).

166100026133 is an equidigital number, since it uses as much as digits as its factorization.

166100026133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 29.

Adding to 166100026133 its reverse (331620001661), we get a palindrome (497720027794).

The spelling of 166100026133 in words is "one hundred sixty-six billion, one hundred million, twenty-six thousand, one hundred thirty-three".