166005265 has 8 divisors (see below), whose sum is σ = 199480320. Its totient is φ = 132621552.

The previous prime is 166005263. The next prime is 166005271. The reversal of 166005265 is 562500661.

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

It is a cyclic number.

It is not a de Polignac number, because 166005265 - 2¹ = 166005263 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166005263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18769 + ... + 26158.

It is an arithmetic number, because the mean of its divisors is an integer number (24935040).

Almost surely, 2^166005265 is an apocalyptic number.

It is an amenable number.

166005265 is a deficient number, since it is larger than the sum of its proper divisors (33475055).

166005265 is an equidigital number, since it uses as much as digits as its factorization.

166005265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45671.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 166005265 is about 12884.3030467309. The cubic root of 166005265 is about 549.5922763351.

The spelling of 166005265 in words is "one hundred sixty-six million, five thousand, two hundred sixty-five".