166072273 has 2 divisors, whose sum is σ = 166072274. Its totient is φ = 166072272.

The previous prime is 166072253. The next prime is 166072307. The reversal of 166072273 is 372270661.

It is a happy number.

It is an a-pointer prime, because the next prime (166072307) can be obtained adding 166072273 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 162511504 + 3560769 = 12748^2 + 1887^2 .

It is a cyclic number.

It is not a de Polignac number, because 166072273 - 2¹⁷ = 165941201 is a prime.

It is not a weakly prime, because it can be changed into another prime (166072223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83036136 + 83036137.

It is an arithmetic number, because the mean of its divisors is an integer number (83036137).

Almost surely, 2^166072273 is an apocalyptic number.

It is an amenable number.

166072273 is a deficient number, since it is larger than the sum of its proper divisors (1).

166072273 is an equidigital number, since it uses as much as digits as its factorization.

166072273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 166072273 is about 12886.9031578576. The cubic root of 166072273 is about 549.6662140006. Note that the first 3 decimals are identical.

The spelling of 166072273 in words is "one hundred sixty-six million, seventy-two thousand, two hundred seventy-three".