666051326533056 has 112 divisors (see below), whose sum is σ = 1855037562358400. Its totient is φ = 210329028006912.

The previous prime is 666051326533049. The next prime is 666051326533141. The reversal of 666051326533056 is 650335623150666.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a junction number, because it is equal to n+sod(n) for n = 666051326532987 and 666051326533005.

It is a congruent number.

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, 264624630 + ... + 267129738.

It is an arithmetic number, because the mean of its divisors is an integer number (16562835378200).

Almost surely, 2^{666051326533056} is an apocalyptic number.

It is an amenable number.

666051326533056 is an abundant number, since it is smaller than the sum of its proper divisors (1188986235825344).

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

666051326533056 is a wasteful number, since it uses less digits than its factorization.

666051326533056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2578026 (or 2578016 counting only the distinct ones).

The product of its (nonzero) digits is 52488000, while the sum is 57.

The spelling of 666051326533056 in words is "six hundred sixty-six trillion, fifty-one billion, three hundred twenty-six million, five hundred thirty-three thousand, fifty-six".