166733038081 has 2 divisors, whose sum is σ = 166733038082. Its totient is φ = 166733038080.

The previous prime is 166733038067. The next prime is 166733038091. The reversal of 166733038081 is 180830337661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166578259600 + 154778481 = 408140^2 + 12441^2 .

It is a cyclic number.

It is not a de Polignac number, because 166733038081 - 2¹⁷ = 166732907009 is a prime.

It is a super-2 number, since 2×166733038081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (166733038091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83366519040 + 83366519041.

It is an arithmetic number, because the mean of its divisors is an integer number (83366519041).

Almost surely, 2^166733038081 is an apocalyptic number.

It is an amenable number.

166733038081 is a deficient number, since it is larger than the sum of its proper divisors (1).

166733038081 is an equidigital number, since it uses as much as digits as its factorization.

166733038081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 46.

The spelling of 166733038081 in words is "one hundred sixty-six billion, seven hundred thirty-three million, thirty-eight thousand, eighty-one".