66709619200 has 720 divisors, whose sum is σ = 205463706624. Its totient is φ = 21366374400.

The previous prime is 66709619173. The next prime is 66709619227. The reversal of 66709619200 is 291690766.

It is an interprime number because it is at equal distance from previous prime (66709619173) and next prime (66709619227).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 913830364 + ... + 913830436.

Almost surely, 2^66709619200 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 66709619200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102731853312).

66709619200 is an abundant number, since it is smaller than the sum of its proper divisors (138754087424).

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

66709619200 is a wasteful number, since it uses less digits than its factorization.

66709619200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193 (or 165 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 46.

The spelling of 66709619200 in words is "sixty-six billion, seven hundred nine million, six hundred nineteen thousand, two hundred".