66450182568 has 128 divisors (see below), whose sum is σ = 208749035520. Its totient is φ = 17123823360.

The previous prime is 66450182567. The next prime is 66450182593. The reversal of 66450182568 is 86528105466.

It is a self number, because there is not a number n which added to its sum of digits gives 66450182568.

It is not an unprimeable number, because it can be changed into a prime (66450182567) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 93130 + ... + 376262.

It is an arithmetic number, because the mean of its divisors is an integer number (1630851840).

Almost surely, 2^66450182568 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 66450182568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104374517760).

66450182568 is an abundant number, since it is smaller than the sum of its proper divisors (142298852952).

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

66450182568 is a wasteful number, since it uses less digits than its factorization.

66450182568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283287 (or 283283 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 51.

The spelling of 66450182568 in words is "sixty-six billion, four hundred fifty million, one hundred eighty-two thousand, five hundred sixty-eight".