12665164020 has 48 divisors (see below), whose sum is σ = 37328907840. Its totient is φ = 3199620096.

The previous prime is 12665164013. The next prime is 12665164021. The reversal of 12665164020 is 2046156621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12665164021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5553757 + ... + 5556036.

It is an arithmetic number, because the mean of its divisors is an integer number (777685580).

Almost surely, 2^12665164020 is an apocalyptic number.

12665164020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12665164020 is an abundant number, since it is smaller than the sum of its proper divisors (24663743820).

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

12665164020 is a wasteful number, since it uses less digits than its factorization.

12665164020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11109824 (or 11109822 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The spelling of 12665164020 in words is "twelve billion, six hundred sixty-five million, one hundred sixty-four thousand, twenty".