66243055000 has 80 divisors (see below), whose sum is σ = 156138832080. Its totient is φ = 26338224000.

The previous prime is 66243054989. The next prime is 66243055019. The reversal of 66243055000 is 55034266.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 795334 + ... + 874666.

It is an arithmetic number, because the mean of its divisors is an integer number (1951735401).

Almost surely, 2^66243055000 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 66243055000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78069416040).

66243055000 is an abundant number, since it is smaller than the sum of its proper divisors (89895777080).

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

66243055000 is a wasteful number, since it uses less digits than its factorization.

66243055000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79526 (or 79507 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 66243055000 its reverse (55034266), we get a palindrome (66298089266).

The spelling of 66243055000 in words is "sixty-six billion, two hundred forty-three million, fifty-five thousand".