66685730430 has 256 divisors, whose sum is σ = 183414067200. Its totient is φ = 15375360000.

The previous prime is 66685730381. The next prime is 66685730431. The reversal of 66685730430 is 3403758666.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66685730430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66685730431) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 95129080 + ... + 95129780.

It is an arithmetic number, because the mean of its divisors is an integer number (716461200).

Almost surely, 2^66685730430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66685730430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91707033600).

66685730430 is an abundant number, since it is smaller than the sum of its proper divisors (116728336770).

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

66685730430 is a wasteful number, since it uses less digits than its factorization.

66685730430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931.

The product of its (nonzero) digits is 2177280, while the sum is 48.

The spelling of 66685730430 in words is "sixty-six billion, six hundred eighty-five million, seven hundred thirty thousand, four hundred thirty".