165655760 has 40 divisors (see below), whose sum is σ = 387181320. Its totient is φ = 65912832.

The previous prime is 165655753. The next prime is 165655829. The reversal of 165655760 is 67556561.

It can be written as a sum of positive squares in 4 ways, for example, as 15936064 + 149719696 = 3992^2 + 12236^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10076 + ... + 20804.

It is an arithmetic number, because the mean of its divisors is an integer number (9679533).

Almost surely, 2^165655760 is an apocalyptic number.

165655760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165655760 is an abundant number, since it is smaller than the sum of its proper divisors (221525560).

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

165655760 is a wasteful number, since it uses less digits than its factorization.

165655760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10935 (or 10929 counting only the distinct ones).

The product of its (nonzero) digits is 189000, while the sum is 41.

The square root of 165655760 is about 12870.7326908766. The cubic root of 165655760 is about 549.2063042177.

The spelling of 165655760 in words is "one hundred sixty-five million, six hundred fifty-five thousand, seven hundred sixty".