166145523 has 8 divisors (see below), whose sum is σ = 228673536. Its totient is φ = 107190600.

The previous prime is 166145477. The next prime is 166145527. The reversal of 166145523 is 325541661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166145523 - 2¹⁰ = 166144499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166145527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 893163 + ... + 893348.

It is an arithmetic number, because the mean of its divisors is an integer number (28584192).

Almost surely, 2^166145523 is an apocalyptic number.

166145523 is a deficient number, since it is larger than the sum of its proper divisors (62528013).

166145523 is a wasteful number, since it uses less digits than its factorization.

166145523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1786545.

The product of its digits is 21600, while the sum is 33.

The square root of 166145523 is about 12889.7448772270. The cubic root of 166145523 is about 549.7470164353.

The spelling of 166145523 in words is "one hundred sixty-six million, one hundred forty-five thousand, five hundred twenty-three".