66530537408000 has 1440 divisors, whose sum is σ = 192656223096480. Its totient is φ = 22846537728000.

The previous prime is 66530537407987. The next prime is 66530537408021. The reversal of 66530537408000 is 80473503566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 337718463902 + ... + 337718464098.

It is an arithmetic number, because the mean of its divisors is an integer number (133789043817).

Almost surely, 2^{66530537408000} 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 66530537408000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96328111548240).

66530537408000 is an abundant number, since it is smaller than the sum of its proper divisors (126125685688480).

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

66530537408000 is a wasteful number, since it uses less digits than its factorization.

66530537408000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 47.

The spelling of 66530537408000 in words is "sixty-six trillion, five hundred thirty billion, five hundred thirty-seven million, four hundred eight thousand".