66500030000 has 50 divisors (see below), whose sum is σ = 161003246844. Its totient is φ = 26600008000.

The previous prime is 66500029961. The next prime is 66500030017. The reversal of 66500030000 is 3000566.

It is a tau number, because it is divible by the number of its divisors (50).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3315002 + ... + 3335001.

Almost surely, 2^66500030000 is an apocalyptic number.

It is an amenable number.

66500030000 is an abundant number, since it is smaller than the sum of its proper divisors (94503216844).

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

66500030000 is an equidigital number, since it uses as much as digits as its factorization.

66500030000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6650031 (or 6650010 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 20.

Adding to 66500030000 its reverse (3000566), we get a palindrome (66503030566).

The spelling of 66500030000 in words is "sixty-six billion, five hundred million, thirty thousand".