66648859200 has 1512 divisors, whose sum is σ = 311429424384. Its totient is φ = 13353984000.

The previous prime is 66648859187. The next prime is 66648859219. The reversal of 66648859200 is 295884666.

It is a happy number.

It is a super-2 number, since 2×66648859200² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 240609462 + ... + 240609738.

Almost surely, 2^66648859200 is an apocalyptic number.

66648859200 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66648859200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155714712192).

66648859200 is an abundant number, since it is smaller than the sum of its proper divisors (244780565184).

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

66648859200 is a wasteful number, since it uses less digits than its factorization.

66648859200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361 (or 336 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 54.

The spelling of 66648859200 in words is "sixty-six billion, six hundred forty-eight million, eight hundred fifty-nine thousand, two hundred".