66065710624 has 48 divisors (see below), whose sum is σ = 138077872128. Its totient is φ = 31008474112.

The previous prime is 66065710621. The next prime is 66065710663. The reversal of 66065710624 is 42601756066.

It is a happy number.

66065710624 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (66065710621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49809 + ... + 366895.

It is an arithmetic number, because the mean of its divisors is an integer number (2876622336).

Almost surely, 2^66065710624 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 66065710624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69038936064).

66065710624 is an abundant number, since it is smaller than the sum of its proper divisors (72012161504).

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

66065710624 is a wasteful number, since it uses less digits than its factorization.

66065710624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317497 (or 317489 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 66065710624 in words is "sixty-six billion, sixty-five million, seven hundred ten thousand, six hundred twenty-four".