166587271 has 2 divisors, whose sum is σ = 166587272. Its totient is φ = 166587270.

The previous prime is 166587257. The next prime is 166587319. The reversal of 166587271 is 172785661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166587271 - 2¹³ = 166579079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166587251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83293635 + 83293636.

It is an arithmetic number, because the mean of its divisors is an integer number (83293636).

Almost surely, 2^166587271 is an apocalyptic number.

166587271 is a deficient number, since it is larger than the sum of its proper divisors (1).

166587271 is an equidigital number, since it uses as much as digits as its factorization.

166587271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 43.

The square root of 166587271 is about 12906.8691401129. The cubic root of 166587271 is about 550.2338080309.

The spelling of 166587271 in words is "one hundred sixty-six million, five hundred eighty-seven thousand, two hundred seventy-one".