12664020480 has 160 divisors (see below), whose sum is σ = 40975127424. Its totient is φ = 3336216576.

The previous prime is 12664020433. The next prime is 12664020491. The reversal of 12664020480 is 8402046621.

It is a tau number, because it is divible by the number of its divisors (160).

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, 627507 + ... + 647373.

Almost surely, 2^12664020480 is an apocalyptic number.

12664020480 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 12664020480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20487563712).

12664020480 is an abundant number, since it is smaller than the sum of its proper divisors (28311106944).

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

12664020480 is an equidigital number, since it uses as much as digits as its factorization.

12664020480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19976 (or 19960 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The spelling of 12664020480 in words is "twelve billion, six hundred sixty-four million, twenty thousand, four hundred eighty".