66115050566606 has 4 divisors (see below), whose sum is σ = 99172575849912. Its totient is φ = 33057525283302.

The previous prime is 66115050566603. The next prime is 66115050566627. The reversal of 66115050566606 is 60666505051166.

It is a happy number.

66115050566606 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×66115050566606² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66115050566603) 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 as a sum of consecutive naturals, namely, 16528762641650 + ... + 16528762641653.

It is an arithmetic number, because the mean of its divisors is an integer number (24793143962478).

Almost surely, 2^{66115050566606} is an apocalyptic number.

66115050566606 is a deficient number, since it is larger than the sum of its proper divisors (33057525283306).

66115050566606 is a wasteful number, since it uses less digits than its factorization.

66115050566606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33057525283305.

The product of its (nonzero) digits is 5832000, while the sum is 53.

The spelling of 66115050566606 in words is "sixty-six trillion, one hundred fifteen billion, fifty million, five hundred sixty-six thousand, six hundred six".