166457273 has 2 divisors, whose sum is σ = 166457274. Its totient is φ = 166457272.

The previous prime is 166457261. The next prime is 166457311. The reversal of 166457273 is 372754661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103286569 + 63170704 = 10163^2 + 7948^2 .

It is a cyclic number.

It is not a de Polignac number, because 166457273 - 2¹⁶ = 166391737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166457273.

It is not a weakly prime, because it can be changed into another prime (166457873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83228636 + 83228637.

It is an arithmetic number, because the mean of its divisors is an integer number (83228637).

Almost surely, 2^166457273 is an apocalyptic number.

It is an amenable number.

166457273 is a deficient number, since it is larger than the sum of its proper divisors (1).

166457273 is an equidigital number, since it uses as much as digits as its factorization.

166457273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 41.

The square root of 166457273 is about 12901.8321567132. The cubic root of 166457273 is about 550.0906440136.

The spelling of 166457273 in words is "one hundred sixty-six million, four hundred fifty-seven thousand, two hundred seventy-three".