66064268404820 has 48 divisors (see below), whose sum is σ = 159114506613888. Its totient is φ = 22570568818560.

The previous prime is 66064268404817. The next prime is 66064268404829. The reversal of 66064268404820 is 2840486246066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66064268404829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 833684111 + ... + 833763350.

It is an arithmetic number, because the mean of its divisors is an integer number (3314885554456).

Almost surely, 2^{66064268404820} is an apocalyptic number.

It is an amenable number.

66064268404820 is an abundant number, since it is smaller than the sum of its proper divisors (93050238209068).

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

66064268404820 is a wasteful number, since it uses less digits than its factorization.

66064268404820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1667447760 (or 1667447758 counting only the distinct ones).

The product of its (nonzero) digits is 21233664, while the sum is 56.

The spelling of 66064268404820 in words is "sixty-six trillion, sixty-four billion, two hundred sixty-eight million, four hundred four thousand, eight hundred twenty".