666017675446518 has 16 divisors (see below), whose sum is σ = 1480039278770160. Its totient is φ = 222005891815488.

The previous prime is 666017675446447. The next prime is 666017675446553. The reversal of 666017675446518 is 815644576710666.

It is a super-2 number, since 2×666017675446518² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6166830328155 + ... + 6166830328262.

It is an arithmetic number, because the mean of its divisors is an integer number (92502454923135).

Almost surely, 2^{666017675446518} is an apocalyptic number.

666017675446518 is an abundant number, since it is smaller than the sum of its proper divisors (814021603323642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666017675446518 is a wasteful number, since it uses less digits than its factorization.

666017675446518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12333660656428 (or 12333660656422 counting only the distinct ones).

The product of its (nonzero) digits is 1219276800, while the sum is 72.

The spelling of 666017675446518 in words is "six hundred sixty-six trillion, seventeen billion, six hundred seventy-five million, four hundred forty-six thousand, five hundred eighteen".