12660681537 has 32 divisors (see below), whose sum is σ = 21528149760. Its totient is φ = 7203600000.

The previous prime is 12660681529. The next prime is 12660681547. The reversal of 12660681537 is 73518606621.

12660681537 is a `hidden beast` number, since 1 + 2 + 6 + 606 + 8 + 1 + 5 + 37 = 666.

It is not a de Polignac number, because 12660681537 - 2³ = 12660681529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12660681492 and 12660681501.

It is not an unprimeable number, because it can be changed into a prime (12660681547) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99714 + ... + 187787.

It is an arithmetic number, because the mean of its divisors is an integer number (672754680).

Almost surely, 2^12660681537 is an apocalyptic number.

It is an amenable number.

12660681537 is a deficient number, since it is larger than the sum of its proper divisors (8867468223).

12660681537 is a wasteful number, since it uses less digits than its factorization.

12660681537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287750 (or 287744 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 12660681537 in words is "twelve billion, six hundred sixty million, six hundred eighty-one thousand, five hundred thirty-seven".