66855043353 has 16 divisors (see below), whose sum is σ = 107866961280. Its totient is φ = 35955653376.

The previous prime is 66855043327. The next prime is 66855043363. The reversal of 66855043353 is 35334055866.

It is not a de Polignac number, because 66855043353 - 2¹³ = 66855035161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66855043313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93634158 + ... + 93634871.

It is an arithmetic number, because the mean of its divisors is an integer number (6741685080).

Almost surely, 2^66855043353 is an apocalyptic number.

It is an amenable number.

66855043353 is a deficient number, since it is larger than the sum of its proper divisors (41011917927).

66855043353 is a wasteful number, since it uses less digits than its factorization.

66855043353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187269056.

The product of its (nonzero) digits is 3888000, while the sum is 48.

The spelling of 66855043353 in words is "sixty-six billion, eight hundred fifty-five million, forty-three thousand, three hundred fifty-three".