665878831650132 has 12 divisors (see below), whose sum is σ = 1553717273850336. Its totient is φ = 221959610550040.

The previous prime is 665878831650107. The next prime is 665878831650169. The reversal of 665878831650132 is 231056138878566.

It is a tau number, because it is divible by the number of its divisors (12).

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 3 ways as a sum of consecutive naturals, for example, 27744951318744 + ... + 27744951318767.

It is an arithmetic number, because the mean of its divisors is an integer number (129476439487528).

Almost surely, 2^{665878831650132} is an apocalyptic number.

It is an amenable number.

665878831650132 is an abundant number, since it is smaller than the sum of its proper divisors (887838442200204).

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

665878831650132 is a wasteful number, since it uses less digits than its factorization.

665878831650132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55489902637518 (or 55489902637516 counting only the distinct ones).

The product of its (nonzero) digits is 348364800, while the sum is 69.

The spelling of 665878831650132 in words is "six hundred sixty-five trillion, eight hundred seventy-eight billion, eight hundred thirty-one million, six hundred fifty thousand, one hundred thirty-two".