666645016305 has 16 divisors (see below), whose sum is σ = 1071415134720. Its totient is φ = 353949639168.

The previous prime is 666645016283. The next prime is 666645016343. The reversal of 666645016305 is 503610546666.

It is not a de Polignac number, because 666645016305 - 2⁵ = 666645016273 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 99644640 + ... + 99651329.

It is an arithmetic number, because the mean of its divisors is an integer number (66963445920).

Almost surely, 2^666645016305 is an apocalyptic number.

It is an amenable number.

666645016305 is a deficient number, since it is larger than the sum of its proper divisors (404770118415).

666645016305 is a wasteful number, since it uses less digits than its factorization.

666645016305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199296200.

The product of its (nonzero) digits is 2332800, while the sum is 48.

The spelling of 666645016305 in words is "six hundred sixty-six billion, six hundred forty-five million, sixteen thousand, three hundred five".