66440985046332 has 288 divisors, whose sum is σ = 172840110944256. Its totient is φ = 19745757964800.

The previous prime is 66440985046301. The next prime is 66440985046339. The reversal of 66440985046332 is 23364058904466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66440985046339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 9531051607 + ... + 9531058577.

It is an arithmetic number, because the mean of its divisors is an integer number (600139274112).

Almost surely, 2^{66440985046332} 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 66440985046332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86420055472128).

66440985046332 is an abundant number, since it is smaller than the sum of its proper divisors (106399125897924).

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

66440985046332 is a wasteful number, since it uses less digits than its factorization.

66440985046332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7441 (or 7396 counting only the distinct ones).

The product of its (nonzero) digits is 89579520, while the sum is 60.

The spelling of 66440985046332 in words is "sixty-six trillion, four hundred forty billion, nine hundred eighty-five million, forty-six thousand, three hundred thirty-two".