66209220000 has 1440 divisors, whose sum is σ = 311693526144. Its totient is φ = 12902400000.

The previous prime is 66209219981. The next prime is 66209220001. The reversal of 66209220000 is 2290266.

It is a tau number, because it is divible by the number of its divisors (1440).

It is not an unprimeable number, because it can be changed into a prime (66209220001) by changing a digit.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 235619860 + ... + 235620140.

Almost surely, 2^66209220000 is an apocalyptic number.

66209220000 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 66209220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155846763072).

66209220000 is an abundant number, since it is smaller than the sum of its proper divisors (245484306144).

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

66209220000 is a wasteful number, since it uses less digits than its factorization.

66209220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352 (or 326 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The spelling of 66209220000 in words is "sixty-six billion, two hundred nine million, two hundred twenty thousand".