165606255 has 16 divisors (see below), whose sum is σ = 294411360. Its totient is φ = 88323264.

The previous prime is 165606229. The next prime is 165606271. The reversal of 165606255 is 552606561.

It is a happy number.

It is not a de Polignac number, because 165606255 - 2¹⁴ = 165589871 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 613222 + ... + 613491.

It is an arithmetic number, because the mean of its divisors is an integer number (18400710).

Almost surely, 2^165606255 is an apocalyptic number.

165606255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

165606255 is a deficient number, since it is larger than the sum of its proper divisors (128805105).

165606255 is a wasteful number, since it uses less digits than its factorization.

165606255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226727 (or 1226721 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 165606255 is about 12868.8093854871. The cubic root of 165606255 is about 549.1515900182.

The spelling of 165606255 in words is "one hundred sixty-five million, six hundred six thousand, two hundred fifty-five".