66608757600 has 1296 divisors, whose sum is σ = 288059563008. Its totient is φ = 13305600000.

The previous prime is 66608757581. The next prime is 66608757629. The reversal of 66608757600 is 675780666.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 441117525 + ... + 441117675.

Almost surely, 2^66608757600 is an apocalyptic number.

66608757600 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 66608757600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144029781504).

66608757600 is an abundant number, since it is smaller than the sum of its proper divisors (221450805408).

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

66608757600 is a wasteful number, since it uses less digits than its factorization.

66608757600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241 (or 210 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 51.

The spelling of 66608757600 in words is "sixty-six billion, six hundred eight million, seven hundred fifty-seven thousand, six hundred".