66002513850 has 960 divisors, whose sum is σ = 239564666880. Its totient is φ = 13101004800.

The previous prime is 66002513807. The next prime is 66002513867. The reversal of 66002513850 is 5831520066.

66002513850 is a `hidden beast` number, since 6 + 60 + 0 + 2 + 513 + 85 + 0 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 479 ways as a sum of consecutive naturals, for example, 605527596 + ... + 605527704.

It is an arithmetic number, because the mean of its divisors is an integer number (249546528).

Almost surely, 2^66002513850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66002513850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119782333440).

66002513850 is an abundant number, since it is smaller than the sum of its proper divisors (173562153030).

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

66002513850 is a wasteful number, since it uses less digits than its factorization.

66002513850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237 (or 223 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 66002513850 in words is "sixty-six billion, two million, five hundred thirteen thousand, eight hundred fifty".