66047704163 has 4 divisors (see below), whose sum is σ = 75483090480. Its totient is φ = 56612317848.

The previous prime is 66047704109. The next prime is 66047704171. The reversal of 66047704163 is 36140774066.

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

It is a cyclic number.

It is not a de Polignac number, because 66047704163 - 2¹² = 66047700067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66047704763) 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 3 ways as a sum of consecutive naturals, for example, 4717693148 + ... + 4717693161.

It is an arithmetic number, because the mean of its divisors is an integer number (18870772620).

Almost surely, 2^66047704163 is an apocalyptic number.

66047704163 is a deficient number, since it is larger than the sum of its proper divisors (9435386317).

66047704163 is an equidigital number, since it uses as much as digits as its factorization.

66047704163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9435386316.

The product of its (nonzero) digits is 508032, while the sum is 44.

The spelling of 66047704163 in words is "sixty-six billion, forty-seven million, seven hundred four thousand, one hundred sixty-three".