165608980 has 12 divisors (see below), whose sum is σ = 347778900. Its totient is φ = 66243584.

The previous prime is 165608969. The next prime is 165609007. The reversal of 165608980 is 89806561.

It can be written as a sum of positive squares in 2 ways, for example, as 92813956 + 72795024 = 9634^2 + 8532^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4140205 + ... + 4140244.

It is an arithmetic number, because the mean of its divisors is an integer number (28981575).

Almost surely, 2^165608980 is an apocalyptic number.

165608980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165608980 is an abundant number, since it is smaller than the sum of its proper divisors (182169920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165608980 is a wasteful number, since it uses less digits than its factorization.

165608980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8280458 (or 8280456 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 165608980 is about 12868.9152612021. The cubic root of 165608980 is about 549.1546020419.

The spelling of 165608980 in words is "one hundred sixty-five million, six hundred eight thousand, nine hundred eighty".