66024443520 has 512 divisors, whose sum is σ = 270288576000. Its totient is φ = 14919303168.

The previous prime is 66024443491. The next prime is 66024443533. The reversal of 66024443520 is 2534442066.

66024443520 is a `hidden beast` number, since 6 + 60 + 244 + 4 + 352 + 0 = 666.

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

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 63 ways as a sum of consecutive naturals, for example, 10762374 + ... + 10768506.

It is an arithmetic number, because the mean of its divisors is an integer number (527907375).

Almost surely, 2^66024443520 is an apocalyptic number.

66024443520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66024443520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135144288000).

66024443520 is an abundant number, since it is smaller than the sum of its proper divisors (204264132480).

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

66024443520 is a wasteful number, since it uses less digits than its factorization.

66024443520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6257 (or 6239 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 36.

Adding to 66024443520 its reverse (2534442066), we get a palindrome (68558885586).

The spelling of 66024443520 in words is "sixty-six billion, twenty-four million, four hundred forty-three thousand, five hundred twenty".