12466620640 has 24 divisors (see below), whose sum is σ = 29452391640. Its totient is φ = 4986648192.

The previous prime is 12466620619. The next prime is 12466620671. The reversal of 12466620640 is 4602666421.

It is a self number, because there is not a number n which added to its sum of digits gives 12466620640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38958030 + ... + 38958349.

It is an arithmetic number, because the mean of its divisors is an integer number (1227182985).

Almost surely, 2^12466620640 is an apocalyptic number.

12466620640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12466620640 is an abundant number, since it is smaller than the sum of its proper divisors (16985771000).

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

12466620640 is an equidigital number, since it uses as much as digits as its factorization.

12466620640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77916394 (or 77916386 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 37.

The spelling of 12466620640 in words is "twelve billion, four hundred sixty-six million, six hundred twenty thousand, six hundred forty".