166533265 has 8 divisors (see below), whose sum is σ = 199915560. Its totient is φ = 133176192.

The previous prime is 166533253. The next prime is 166533287. The reversal of 166533265 is 562335661.

It can be written as a sum of positive squares in 4 ways, for example, as 99440784 + 67092481 = 9972^2 + 8191^2 .

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 166533265 - 2¹⁷ = 166402193 is a prime.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 14427 + ... + 23263.

It is an arithmetic number, because the mean of its divisors is an integer number (24989445).

Almost surely, 2^166533265 is an apocalyptic number.

It is an amenable number.

166533265 is a deficient number, since it is larger than the sum of its proper divisors (33382295).

166533265 is an equidigital number, since it uses as much as digits as its factorization.

166533265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12611.

The product of its digits is 97200, while the sum is 37.

The square root of 166533265 is about 12904.7768287561. The cubic root of 166533265 is about 550.1743414249.

The spelling of 166533265 in words is "one hundred sixty-six million, five hundred thirty-three thousand, two hundred sixty-five".