66689988200 has 48 divisors (see below), whose sum is σ = 169150066560. Its totient is φ = 24250904000.

The previous prime is 66689988173. The next prime is 66689988221. The reversal of 66689988200 is 288998666.

It is a super-2 number, since 2×66689988200² (a number of 22 digits) contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 15154616 + ... + 15159015.

It is an arithmetic number, because the mean of its divisors is an integer number (3523959720).

Almost surely, 2^66689988200 is an apocalyptic number.

It is an amenable number.

66689988200 is an abundant number, since it is smaller than the sum of its proper divisors (102460078360).

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

66689988200 is a wasteful number, since it uses less digits than its factorization.

66689988200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30313658 (or 30313649 counting only the distinct ones).

The product of its (nonzero) digits is 17915904, while the sum is 62.

The spelling of 66689988200 in words is "sixty-six billion, six hundred eighty-nine million, nine hundred eighty-eight thousand, two hundred".