66029741440 has 128 divisors (see below), whose sum is σ = 172877392800. Its totient is φ = 23966810112.

The previous prime is 66029741417. The next prime is 66029741441. The reversal of 66029741440 is 4414792066.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66029741441) 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, 423624 + ... + 558136.

Almost surely, 2^66029741440 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 66029741440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86438696400).

66029741440 is an abundant number, since it is smaller than the sum of its proper divisors (106847651360).

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

66029741440 is a wasteful number, since it uses less digits than its factorization.

66029741440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134604 (or 134592 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 43.

The spelling of 66029741440 in words is "sixty-six billion, twenty-nine million, seven hundred forty-one thousand, four hundred forty".