166517071 has 4 divisors (see below), whose sum is σ = 190305232. Its totient is φ = 142728912.

The previous prime is 166517063. The next prime is 166517123. The reversal of 166517071 is 170715661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 170715661 = 12451 ⋅13711.

It is a cyclic number.

It is not a de Polignac number, because 166517071 - 2³ = 166517063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166517041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11894070 + ... + 11894083.

It is an arithmetic number, because the mean of its divisors is an integer number (47576308).

Almost surely, 2^166517071 is an apocalyptic number.

166517071 is a deficient number, since it is larger than the sum of its proper divisors (23788161).

166517071 is an equidigital number, since it uses as much as digits as its factorization.

166517071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23788160.

The product of its (nonzero) digits is 8820, while the sum is 34.

The square root of 166517071 is about 12904.1493714231. The cubic root of 166517071 is about 550.1565075262.

The spelling of 166517071 in words is "one hundred sixty-six million, five hundred seventeen thousand, seventy-one".