666340065564103 has 12 divisors (see below), whose sum is σ = 775726076181672. Its totient is φ = 570709620171600.

The previous prime is 666340065564073. The next prime is 666340065564137. The reversal of 666340065564103 is 301465560043666.

It is not a de Polignac number, because 666340065564103 - 2⁵ = 666340065564071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666340065567103) 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 11 ways as a sum of consecutive naturals, for example, 5226214825 + ... + 5226342322.

It is an arithmetic number, because the mean of its divisors is an integer number (64643839681806).

Almost surely, 2^{666340065564103} is an apocalyptic number.

666340065564103 is a deficient number, since it is larger than the sum of its proper divisors (109386010617569).

666340065564103 is a wasteful number, since it uses less digits than its factorization.

666340065564103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10452558462 (or 10452558455 counting only the distinct ones).

The product of its (nonzero) digits is 27993600, while the sum is 55.

The spelling of 666340065564103 in words is "six hundred sixty-six trillion, three hundred forty billion, sixty-five million, five hundred sixty-four thousand, one hundred three".