166725271 has 2 divisors, whose sum is σ = 166725272. Its totient is φ = 166725270.

The previous prime is 166725269. The next prime is 166725277. The reversal of 166725271 is 172527661.

It is a weak prime.

It is an emirp because it is prime and its reverse (172527661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166725271 - 2¹ = 166725269 is a prime.

Together with 166725269, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 166725271.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166725277) 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, 83362635 + 83362636.

It is an arithmetic number, because the mean of its divisors is an integer number (83362636).

Almost surely, 2^166725271 is an apocalyptic number.

166725271 is a deficient number, since it is larger than the sum of its proper divisors (1).

166725271 is an equidigital number, since it uses as much as digits as its factorization.

166725271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35280, while the sum is 37.

The square root of 166725271 is about 12912.2140239387. The cubic root of 166725271 is about 550.3857030054.

The spelling of 166725271 in words is "one hundred sixty-six million, seven hundred twenty-five thousand, two hundred seventy-one".