66610010500056 has 128 divisors (see below), whose sum is σ = 197851517438400. Its totient is φ = 20690354534400.

The previous prime is 66610010500049. The next prime is 66610010500057. The reversal of 66610010500056 is 65000501001666.

66610010500056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66610010500057) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 89431015 + ... + 90172758.

Almost surely, 2^{66610010500056} is an apocalyptic number.

It is an amenable number.

66610010500056 is an abundant number, since it is smaller than the sum of its proper divisors (131241506938344).

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

66610010500056 is a wasteful number, since it uses less digits than its factorization.

66610010500056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179603906 (or 179603896 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 66610010500056 in words is "sixty-six trillion, six hundred ten billion, ten million, five hundred thousand, fifty-six".