66570307643 has 6 divisors (see below), whose sum is σ = 77438929356. Its totient is φ = 57060263652.

The previous prime is 66570307637. The next prime is 66570307691. The reversal of 66570307643 is 34670307566.

It is not a de Polignac number, because 66570307643 - 2⁶ = 66570307579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66570307613) 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 5 ways as a sum of consecutive naturals, for example, 679288805 + ... + 679288902.

It is an arithmetic number, because the mean of its divisors is an integer number (12906488226).

Almost surely, 2^66570307643 is an apocalyptic number.

66570307643 is a deficient number, since it is larger than the sum of its proper divisors (10868621713).

66570307643 is a wasteful number, since it uses less digits than its factorization.

66570307643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1358577721 (or 1358577714 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 47.

The spelling of 66570307643 in words is "sixty-six billion, five hundred seventy million, three hundred seven thousand, six hundred forty-three".