66610842480000 has 6400 divisors, whose sum is σ = 324910223447040. Its totient is φ = 13168189440000.

The previous prime is 66610842479989. The next prime is 66610842480023. The reversal of 66610842480000 is 8424801666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 799 ways as a sum of consecutive naturals, for example, 938180879965 + ... + 938180880035.

Almost surely, 2^{66610842480000} is an apocalyptic number.

66610842480000 is a gapful number since it is divisible by the number (60) 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 66610842480000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162455111723520).

66610842480000 is an abundant number, since it is smaller than the sum of its proper divisors (258299380967040).

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

66610842480000 is a wasteful number, since it uses less digits than its factorization.

66610842480000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The spelling of 66610842480000 in words is "sixty-six trillion, six hundred ten billion, eight hundred forty-two million, four hundred eighty thousand".