66834462618 has 192 divisors, whose sum is σ = 189937612800. Its totient is φ = 16476324480.

The previous prime is 66834462613. The next prime is 66834462619. The reversal of 66834462618 is 81626443866.

66834462618 is a `hidden beast` number, since 6 + 6 + 8 + 3 + 4 + 4 + 626 + 1 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (66834462613) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 2357355 + ... + 2385537.

It is an arithmetic number, because the mean of its divisors is an integer number (989258400).

Almost surely, 2^66834462618 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66834462618, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94968806400).

66834462618 is an abundant number, since it is smaller than the sum of its proper divisors (123103150182).

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

66834462618 is a wasteful number, since it uses less digits than its factorization.

66834462618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28297 (or 28294 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 54.

The spelling of 66834462618 in words is "sixty-six billion, eight hundred thirty-four million, four hundred sixty-two thousand, six hundred eighteen".