12001520660 has 24 divisors (see below), whose sum is σ = 26072270280. Its totient is φ = 4635069824.

The previous prime is 12001520653. The next prime is 12001520669. The reversal of 12001520660 is 6602510021.

It can be written as a sum of positive squares in 4 ways, for example, as 191047684 + 11810472976 = 13822^2 + 108676^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001520669) 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, 10345559 + ... + 10346718.

It is an arithmetic number, because the mean of its divisors is an integer number (1086344595).

Almost surely, 2^12001520660 is an apocalyptic number.

12001520660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001520660 is an abundant number, since it is smaller than the sum of its proper divisors (14070749620).

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

12001520660 is a wasteful number, since it uses less digits than its factorization.

12001520660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20692315 (or 20692313 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The spelling of 12001520660 in words is "twelve billion, one million, five hundred twenty thousand, six hundred sixty".