66383436816 has 160 divisors (see below), whose sum is σ = 203835703680. Its totient is φ = 20611252224.

The previous prime is 66383436773. The next prime is 66383436871. The reversal of 66383436816 is 61863438366.

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

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 665775 + ... + 758961.

It is an arithmetic number, because the mean of its divisors is an integer number (1273973148).

Almost surely, 2^66383436816 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 66383436816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101917851840).

66383436816 is an abundant number, since it is smaller than the sum of its proper divisors (137452266864).

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

66383436816 is a wasteful number, since it uses less digits than its factorization.

66383436816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93318 (or 93306 counting only the distinct ones).

The product of its digits is 8957952, while the sum is 54.

The spelling of 66383436816 in words is "sixty-six billion, three hundred eighty-three million, four hundred thirty-six thousand, eight hundred sixteen".