66051666500 has 48 divisors (see below), whose sum is σ = 151849326720. Its totient is φ = 25030101600.

The previous prime is 66051666491. The next prime is 66051666539. The reversal of 66051666500 is 566615066.

66051666500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3466904 + ... + 3485903.

It is an arithmetic number, because the mean of its divisors is an integer number (3163527640).

Almost surely, 2^66051666500 is an apocalyptic number.

It is an amenable number.

66051666500 is an abundant number, since it is smaller than the sum of its proper divisors (85797660220).

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

66051666500 is a wasteful number, since it uses less digits than its factorization.

66051666500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6952845 (or 6952833 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 66051666500 in words is "sixty-six billion, fifty-one million, six hundred sixty-six thousand, five hundred".