166457873 has 2 divisors, whose sum is σ = 166457874. Its totient is φ = 166457872.

The previous prime is 166457869. The next prime is 166457891. The reversal of 166457873 is 378754661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84953089 + 81504784 = 9217^2 + 9028^2 .

It is an emirp because it is prime and its reverse (378754661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166457873 - 2² = 166457869 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (166457813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83228936 + 83228937.

It is an arithmetic number, because the mean of its divisors is an integer number (83228937).

Almost surely, 2^166457873 is an apocalyptic number.

It is an amenable number.

166457873 is a deficient number, since it is larger than the sum of its proper divisors (1).

166457873 is an equidigital number, since it uses as much as digits as its factorization.

166457873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 846720, while the sum is 47.

The square root of 166457873 is about 12901.8554092037. The cubic root of 166457873 is about 550.0913049519.

The spelling of 166457873 in words is "one hundred sixty-six million, four hundred fifty-seven thousand, eight hundred seventy-three".