12665240424 has 48 divisors (see below), whose sum is σ = 34491240420. Its totient is φ = 4198417920.

The previous prime is 12665240327. The next prime is 12665240461. The reversal of 12665240424 is 42404256621.

12665240424 is a `hidden beast` number, since 126 + 6 + 524 + 0 + 4 + 2 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10103868324 + 2561372100 = 100518^2 + 50610^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 472897 + ... + 498960.

Almost surely, 2^12665240424 is an apocalyptic number.

It is an amenable number.

12665240424 is an abundant number, since it is smaller than the sum of its proper divisors (21825999996).

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

12665240424 is a wasteful number, since it uses less digits than its factorization.

12665240424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972050 (or 972043 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

The spelling of 12665240424 in words is "twelve billion, six hundred sixty-five million, two hundred forty thousand, four hundred twenty-four".