166284593173 has 2 divisors, whose sum is σ = 166284593174. Its totient is φ = 166284593172.

The previous prime is 166284593099. The next prime is 166284593177. The reversal of 166284593173 is 371395482661.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143131318929 + 23153274244 = 378327^2 + 152162^2 .

It is a cyclic number.

It is not a de Polignac number, because 166284593173 - 2³⁷ = 28845639701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166284593177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83142296586 + 83142296587.

It is an arithmetic number, because the mean of its divisors is an integer number (83142296587).

Almost surely, 2^166284593173 is an apocalyptic number.

It is an amenable number.

166284593173 is a deficient number, since it is larger than the sum of its proper divisors (1).

166284593173 is an equidigital number, since it uses as much as digits as its factorization.

166284593173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6531840, while the sum is 55.

The spelling of 166284593173 in words is "one hundred sixty-six billion, two hundred eighty-four million, five hundred ninety-three thousand, one hundred seventy-three".