66423605250 has 64 divisors (see below), whose sum is σ = 166245760512. Its totient is φ = 17664624000.

The previous prime is 66423605207. The next prime is 66423605257. The reversal of 66423605250 is 5250632466.

66423605250 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 66423605199 and 66423605208.

It is not an unprimeable number, because it can be changed into a prime (66423605257) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 154590 + ... + 395910.

It is an arithmetic number, because the mean of its divisors is an integer number (2597590008).

Almost surely, 2^66423605250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66423605250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83122880256).

66423605250 is an abundant number, since it is smaller than the sum of its proper divisors (99822155262).

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

66423605250 is a wasteful number, since it uses less digits than its factorization.

66423605250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241708 (or 241698 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 39.

The spelling of 66423605250 in words is "sixty-six billion, four hundred twenty-three million, six hundred five thousand, two hundred fifty".