66673400736 has 96 divisors (see below), whose sum is σ = 181128407040. Its totient is φ = 21449143296.

The previous prime is 66673400719. The next prime is 66673400771. The reversal of 66673400736 is 63700437666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

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 15 ways as a sum of consecutive naturals, for example, 11041110 + ... + 11047146.

It is an arithmetic number, because the mean of its divisors is an integer number (1886754240).

Almost surely, 2^66673400736 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 66673400736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90564203520).

66673400736 is an abundant number, since it is smaller than the sum of its proper divisors (114455006304).

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

66673400736 is a wasteful number, since it uses less digits than its factorization.

66673400736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10046 (or 10038 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 48.

The spelling of 66673400736 in words is "sixty-six billion, six hundred seventy-three million, four hundred thousand, seven hundred thirty-six".