66635144384 has 56 divisors (see below), whose sum is σ = 135970658208. Its totient is φ = 32381020160.

The previous prime is 66635144383. The next prime is 66635144399. The reversal of 66635144384 is 48344153666.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (66635144383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 641834 + ... + 738390.

It is an arithmetic number, because the mean of its divisors is an integer number (2428047468).

Almost surely, 2^66635144384 is an apocalyptic number.

66635144384 is a gapful number since it is divisible by the number (64) 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 66635144384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67985329104).

66635144384 is an abundant number, since it is smaller than the sum of its proper divisors (69335513824).

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

66635144384 is a wasteful number, since it uses less digits than its factorization.

66635144384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96873 (or 96863 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 50.

The spelling of 66635144384 in words is "sixty-six billion, six hundred thirty-five million, one hundred forty-four thousand, three hundred eighty-four".