66603715200 has 1152 divisors, whose sum is σ = 279685224000. Its totient is φ = 14912716800.

The previous prime is 66603715177. The next prime is 66603715229. The reversal of 66603715200 is 251730666.

It is a tau number, because it is divible by the number of its divisors (1152).

It is a super-2 number, since 2×66603715200² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 447004726 + ... + 447004874.

Almost surely, 2^66603715200 is an apocalyptic number.

66603715200 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 66603715200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139842612000).

66603715200 is an abundant number, since it is smaller than the sum of its proper divisors (213081508800).

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

66603715200 is a wasteful number, since it uses less digits than its factorization.

66603715200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290 (or 270 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The spelling of 66603715200 in words is "sixty-six billion, six hundred three million, seven hundred fifteen thousand, two hundred".