166860265 has 16 divisors (see below), whose sum is σ = 235238976. Its totient is φ = 112017600.

The previous prime is 166860263. The next prime is 166860289. The reversal of 166860265 is 562068661.

It is not a de Polignac number, because 166860265 - 2¹ = 166860263 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166860263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115971 + ... + 117400.

It is an arithmetic number, because the mean of its divisors is an integer number (14702436).

Almost surely, 2^166860265 is an apocalyptic number.

It is an amenable number.

166860265 is a deficient number, since it is larger than the sum of its proper divisors (68378711).

166860265 is a wasteful number, since it uses less digits than its factorization.

166860265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233400.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 166860265 is about 12917.4403424208. The cubic root of 166860265 is about 550.5342082348.

The spelling of 166860265 in words is "one hundred sixty-six million, eight hundred sixty thousand, two hundred sixty-five".