66043464144 has 160 divisors (see below), whose sum is σ = 196501780224. Its totient is φ = 18723287040.

The previous prime is 66043464107. The next prime is 66043464161. The reversal of 66043464144 is 44146434066.

It is a super-2 number, since 2×66043464144² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 66043464096 and 66043464105.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44234662 + ... + 44236154.

Almost surely, 2^66043464144 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 66043464144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98250890112).

66043464144 is an abundant number, since it is smaller than the sum of its proper divisors (130458316080).

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

66043464144 is a wasteful number, since it uses less digits than its factorization.

66043464144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2445 (or 2439 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 42.

The spelling of 66043464144 in words is "sixty-six billion, forty-three million, four hundred sixty-four thousand, one hundred forty-four".