165656265 has 16 divisors (see below), whose sum is σ = 274190400. Its totient is φ = 85303232.

The previous prime is 165656221. The next prime is 165656273. The reversal of 165656265 is 562656561.

It is a cyclic number.

It is not a de Polignac number, because 165656265 - 2⁷ = 165656137 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189975 + ... + 190844.

It is an arithmetic number, because the mean of its divisors is an integer number (17136900).

Almost surely, 2^165656265 is an apocalyptic number.

165656265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165656265 is a deficient number, since it is larger than the sum of its proper divisors (108534135).

165656265 is a wasteful number, since it uses less digits than its factorization.

165656265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380856.

The product of its digits is 324000, while the sum is 42.

The square root of 165656265 is about 12870.7523090144. The cubic root of 165656265 is about 549.2068623005.

The spelling of 165656265 in words is "one hundred sixty-five million, six hundred fifty-six thousand, two hundred sixty-five".