66230947505520 has 1280 divisors, whose sum is σ = 281110327787520. Its totient is φ = 13988510908416.

The previous prime is 66230947505519. The next prime is 66230947505539. The reversal of 66230947505520 is 2550574903266.

It is a happy number.

66230947505520 is a `hidden beast` number, since 6 + 6 + 2 + 30 + 9 + 4 + 7 + 50 + 552 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 5287049497 + ... + 5287062023.

It is an arithmetic number, because the mean of its divisors is an integer number (219617443584).

Almost surely, 2^{66230947505520} is an apocalyptic number.

66230947505520 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 66230947505520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140555163893760).

66230947505520 is an abundant number, since it is smaller than the sum of its proper divisors (214879380282000).

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

66230947505520 is a wasteful number, since it uses less digits than its factorization.

66230947505520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12947 (or 12935 counting only the distinct ones).

The product of its (nonzero) digits is 13608000, while the sum is 54.

The spelling of 66230947505520 in words is "sixty-six trillion, two hundred thirty billion, nine hundred forty-seven million, five hundred five thousand, five hundred twenty".