66703336704 has 126 divisors (see below), whose sum is σ = 199628407706. Its totient is φ = 22234383360.

The previous prime is 66703336699. The next prime is 66703336717. The reversal of 66703336704 is 40763330766.

It can be written as a sum of positive squares in only one way, i.e., 51438240000 + 15265096704 = 226800^2 + 123552^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66703336704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 7914 + ... + 365334.

Almost surely, 2^66703336704 is an apocalyptic number.

66703336704 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66703336704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99814203853).

66703336704 is an abundant number, since it is smaller than the sum of its proper divisors (132925071002).

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

66703336704 is an frugal number, since it uses more digits than its factorization.

66703336704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357455 (or 357426 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 45.

The spelling of 66703336704 in words is "sixty-six billion, seven hundred three million, three hundred thirty-six thousand, seven hundred four".