166044133 has 2 divisors, whose sum is σ = 166044134. Its totient is φ = 166044132.

The previous prime is 166044119. The next prime is 166044149. The reversal of 166044133 is 331440661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165431044 + 613089 = 12862^2 + 783^2 .

It is an emirp because it is prime and its reverse (331440661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166044133 - 2¹⁷ = 165913061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166044163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83022066 + 83022067.

It is an arithmetic number, because the mean of its divisors is an integer number (83022067).

Almost surely, 2^166044133 is an apocalyptic number.

It is an amenable number.

166044133 is a deficient number, since it is larger than the sum of its proper divisors (1).

166044133 is an equidigital number, since it uses as much as digits as its factorization.

166044133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 166044133 is about 12885.8113054631. The cubic root of 166044133 is about 549.6351663114.

Adding to 166044133 its reverse (331440661), we get a palindrome (497484794).

The spelling of 166044133 in words is "one hundred sixty-six million, forty-four thousand, one hundred thirty-three".