12720077520660 has 72 divisors (see below), whose sum is σ = 38584670351136. Its totient is φ = 3391982412480.

The previous prime is 12720077520613. The next prime is 12720077520671. The reversal of 12720077520660 is 6602577002721.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17942247 + ... + 18637713.

Almost surely, 2^{12720077520660} is an apocalyptic number.

12720077520660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12720077520660 is an abundant number, since it is smaller than the sum of its proper divisors (25864592830476).

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

12720077520660 is a wasteful number, since it uses less digits than its factorization.

12720077520660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797093 (or 797088 counting only the distinct ones).

The product of its (nonzero) digits is 493920, while the sum is 45.

The spelling of 12720077520660 in words is "twelve trillion, seven hundred twenty billion, seventy-seven million, five hundred twenty thousand, six hundred sixty".