12663497720 has 64 divisors (see below), whose sum is σ = 30027196800. Its totient is φ = 4793247360.

The previous prime is 12663497689. The next prime is 12663497741. The reversal of 12663497720 is 2779436621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 680135 + ... + 698505.

It is an arithmetic number, because the mean of its divisors is an integer number (469174950).

Almost surely, 2^12663497720 is an apocalyptic number.

12663497720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12663497720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15013598400).

12663497720 is an abundant number, since it is smaller than the sum of its proper divisors (17363699080).

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

12663497720 is a wasteful number, since it uses less digits than its factorization.

12663497720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19308 (or 19304 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 47.

The spelling of 12663497720 in words is "twelve billion, six hundred sixty-three million, four hundred ninety-seven thousand, seven hundred twenty".