13320666144 has 72 divisors (see below), whose sum is σ = 38004286320. Its totient is φ = 4425729408.

The previous prime is 13320666143. The next prime is 13320666157. The reversal of 13320666144 is 44166602331.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 13320666099 and 13320666108.

It is not an unprimeable number, because it can be changed into a prime (13320666143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13087 + ... + 163745.

It is an arithmetic number, because the mean of its divisors is an integer number (527837310).

Almost surely, 2^13320666144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13320666144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19002143160).

13320666144 is an abundant number, since it is smaller than the sum of its proper divisors (24683620176).

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

13320666144 is a wasteful number, since it uses less digits than its factorization.

13320666144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150982 (or 150971 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The spelling of 13320666144 in words is "thirteen billion, three hundred twenty million, six hundred sixty-six thousand, one hundred forty-four".