66530513200 has 120 divisors (see below), whose sum is σ = 169512373728. Its totient is φ = 25006755840.

The previous prime is 66530513167. The next prime is 66530513201. The reversal of 66530513200 is 231503566.

66530513200 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (66530513201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4432909 + ... + 4447891.

Almost surely, 2^66530513200 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 66530513200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84756186864).

66530513200 is an abundant number, since it is smaller than the sum of its proper divisors (102981860528).

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

66530513200 is a wasteful number, since it uses less digits than its factorization.

66530513200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15671 (or 15660 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 31.

The spelling of 66530513200 in words is "sixty-six billion, five hundred thirty million, five hundred thirteen thousand, two hundred".