66348310571 has 4 divisors (see below), whose sum is σ = 68141508192. Its totient is φ = 64555112952.

The previous prime is 66348310531. The next prime is 66348310619. The reversal of 66348310571 is 17501384366.

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 66348310571 - 2¹⁸ = 66348048427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66348310531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 896598755 + ... + 896598828.

It is an arithmetic number, because the mean of its divisors is an integer number (17035377048).

Almost surely, 2^66348310571 is an apocalyptic number.

66348310571 is a deficient number, since it is larger than the sum of its proper divisors (1793197621).

66348310571 is a wasteful number, since it uses less digits than its factorization.

66348310571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1793197620.

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 66348310571 in words is "sixty-six billion, three hundred forty-eight million, three hundred ten thousand, five hundred seventy-one".