66650242176 has 768 divisors, whose sum is σ = 239136796800. Its totient is φ = 18435465216.

The previous prime is 66650242171. The next prime is 66650242193. The reversal of 66650242176 is 67124205666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66650242171) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 589825096 + ... + 589825208.

Almost surely, 2^66650242176 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 66650242176, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119568398400).

66650242176 is an abundant number, since it is smaller than the sum of its proper divisors (172486554624).

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

66650242176 is an equidigital number, since it uses as much as digits as its factorization.

66650242176 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 66650242176 in words is "sixty-six billion, six hundred fifty million, two hundred forty-two thousand, one hundred seventy-six".