166265265 has 32 divisors (see below), whose sum is σ = 276307200. Its totient is φ = 85272320.

The previous prime is 166265263. The next prime is 166265269. The reversal of 166265265 is 562562661.

It is a happy number.

It is not a de Polignac number, because 166265265 - 2¹ = 166265263 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166265263) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 134671 + ... + 135899.

It is an arithmetic number, because the mean of its divisors is an integer number (8634600).

Almost surely, 2^166265265 is an apocalyptic number.

166265265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166265265 is a deficient number, since it is larger than the sum of its proper divisors (110041935).

166265265 is a wasteful number, since it uses less digits than its factorization.

166265265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1577.

The product of its digits is 129600, while the sum is 39.

The square root of 166265265 is about 12894.3888959501. The cubic root of 166265265 is about 549.8790532952.

The spelling of 166265265 in words is "one hundred sixty-six million, two hundred sixty-five thousand, two hundred sixty-five".