66299717484 has 768 divisors, whose sum is σ = 242386206720. Its totient is φ = 15116544000.

The previous prime is 66299717483. The next prime is 66299717531. The reversal of 66299717484 is 48471799266.

66299717484 is a `hidden beast` number, since 6 + 62 + 9 + 97 + 1 + 7 + 484 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (66299717483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 244648269 + ... + 244648539.

It is an arithmetic number, because the mean of its divisors is an integer number (315607040).

Almost surely, 2^66299717484 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 66299717484, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121193103360).

66299717484 is an abundant number, since it is smaller than the sum of its proper divisors (176086489236).

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

66299717484 is a wasteful number, since it uses less digits than its factorization.

66299717484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419 (or 411 counting only the distinct ones).

The product of its digits is 36578304, while the sum is 63.

The spelling of 66299717484 in words is "sixty-six billion, two hundred ninety-nine million, seven hundred seventeen thousand, four hundred eighty-four".