66526035503616 has 480 divisors, whose sum is σ = 218394211875840. Its totient is φ = 19325922803712.

The previous prime is 66526035503579. The next prime is 66526035503639. The reversal of 66526035503616 is 61630553062566.

66526035503616 is a `hidden beast` number, since 6 + 6 + 5 + 26 + 0 + 3 + 550 + 3 + 61 + 6 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 333385825 + ... + 333585311.

It is an arithmetic number, because the mean of its divisors is an integer number (454987941408).

Almost surely, 2^{66526035503616} 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 66526035503616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109197105937920).

66526035503616 is an abundant number, since it is smaller than the sum of its proper divisors (151868176372224).

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

66526035503616 is a wasteful number, since it uses less digits than its factorization.

66526035503616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199836 (or 199817 counting only the distinct ones).

The product of its (nonzero) digits is 17496000, while the sum is 54.

The spelling of 66526035503616 in words is "sixty-six trillion, five hundred twenty-six billion, thirty-five million, five hundred three thousand, six hundred sixteen".