66734403740 has 24 divisors (see below), whose sum is σ = 140675119200. Its totient is φ = 26592262208.

The previous prime is 66734403739. The next prime is 66734403761. The reversal of 66734403740 is 4730443766.

It is a happy number.

66734403740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 66734403691 and 66734403700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6338315 + ... + 6348834.

It is an arithmetic number, because the mean of its divisors is an integer number (5861463300).

Almost surely, 2^66734403740 is an apocalyptic number.

It is an amenable number.

66734403740 is an abundant number, since it is smaller than the sum of its proper divisors (73940715460).

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

66734403740 is a wasteful number, since it uses less digits than its factorization.

66734403740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12687421 (or 12687419 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 44.

The spelling of 66734403740 in words is "sixty-six billion, seven hundred thirty-four million, four hundred three thousand, seven hundred forty".