66750057532480 has 448 divisors, whose sum is σ = 190813094461440. Its totient is φ = 21768034369536.

The previous prime is 66750057532451. The next prime is 66750057532489. The reversal of 66750057532480 is 8423575005766.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (448).

It is not an unprimeable number, because it can be changed into a prime (66750057532489) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 555417357 + ... + 555537523.

Almost surely, 2^{66750057532480} 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 66750057532480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95406547230720).

66750057532480 is an abundant number, since it is smaller than the sum of its proper divisors (124063036928960).

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

66750057532480 is a wasteful number, since it uses less digits than its factorization.

66750057532480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120386 (or 120376 counting only the distinct ones).

The product of its (nonzero) digits is 42336000, while the sum is 58.

The spelling of 66750057532480 in words is "sixty-six trillion, seven hundred fifty billion, fifty-seven million, five hundred thirty-two thousand, four hundred eighty".