165712660 has 24 divisors (see below), whose sum is σ = 351910440. Its totient is φ = 65539584.

The previous prime is 165712649. The next prime is 165712663. The reversal of 165712660 is 66217561.

It is a happy number.

165712660 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 538756 + 165173904 = 734^2 + 12852^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165712663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44769 + ... + 48328.

It is an arithmetic number, because the mean of its divisors is an integer number (14662935).

Almost surely, 2^165712660 is an apocalyptic number.

165712660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165712660 is an abundant number, since it is smaller than the sum of its proper divisors (186197780).

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

165712660 is a wasteful number, since it uses less digits than its factorization.

165712660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93195 (or 93193 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 165712660 is about 12872.9429424666. The cubic root of 165712660 is about 549.2691780984.

The spelling of 165712660 in words is "one hundred sixty-five million, seven hundred twelve thousand, six hundred sixty".