660165160660 has 24 divisors (see below), whose sum is σ = 1386396796680. Its totient is φ = 264056548224.

The previous prime is 660165160639. The next prime is 660165160661. The reversal of 660165160660 is 66061561066.

It can be written as a sum of positive squares in 4 ways, for example, as 6082128144 + 654083032516 = 77988^2 + 808754^2 .

It is a super-2 number, since 2×660165160660² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660165160661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11959 + ... + 1149118.

It is an arithmetic number, because the mean of its divisors is an integer number (57766533195).

Almost surely, 2^660165160660 is an apocalyptic number.

It is an amenable number.

660165160660 is an abundant number, since it is smaller than the sum of its proper divisors (726231636020).

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

660165160660 is a wasteful number, since it uses less digits than its factorization.

660165160660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189515 (or 1189513 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 43.

The spelling of 660165160660 in words is "six hundred sixty billion, one hundred sixty-five million, one hundred sixty thousand, six hundred sixty".