166212773 has 2 divisors, whose sum is σ = 166212774. Its totient is φ = 166212772.

The previous prime is 166212763. The next prime is 166212841. The reversal of 166212773 is 377212661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160224964 + 5987809 = 12658^2 + 2447^2 .

It is a cyclic number.

It is not a de Polignac number, because 166212773 - 2¹⁴ = 166196389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166212713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83106386 + 83106387.

It is an arithmetic number, because the mean of its divisors is an integer number (83106387).

Almost surely, 2^166212773 is an apocalyptic number.

It is an amenable number.

166212773 is a deficient number, since it is larger than the sum of its proper divisors (1).

166212773 is an equidigital number, since it uses as much as digits as its factorization.

166212773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21168, while the sum is 35.

The square root of 166212773 is about 12892.3532762642. The cubic root of 166212773 is about 549.8211793322.

The spelling of 166212773 in words is "one hundred sixty-six million, two hundred twelve thousand, seven hundred seventy-three".