66144014500650 has 96 divisors (see below), whose sum is σ = 164862543955200. Its totient is φ = 17549870849280.

The previous prime is 66144014500621. The next prime is 66144014500651. The reversal of 66144014500650 is 5600541044166.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66144014500651) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22873584 + ... + 25602516.

It is an arithmetic number, because the mean of its divisors is an integer number (1717318166200).

Almost surely, 2^{66144014500650} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66144014500650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82431271977600).

66144014500650 is an abundant number, since it is smaller than the sum of its proper divisors (98718529454550).

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

66144014500650 is a wasteful number, since it uses less digits than its factorization.

66144014500650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2729760 (or 2729755 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 66144014500650 in words is "sixty-six trillion, one hundred forty-four billion, fourteen million, five hundred thousand, six hundred fifty".