666502164405 has 192 divisors, whose sum is σ = 1505207328768. Its totient is φ = 264787246080.

The previous prime is 666502164343. The next prime is 666502164421. The reversal of 666502164405 is 504461205666.

It is not a de Polignac number, because 666502164405 - 2¹⁰ = 666502163381 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 6955177 + ... + 7050353.

It is an arithmetic number, because the mean of its divisors is an integer number (7839621504).

Almost surely, 2^666502164405 is an apocalyptic number.

It is an amenable number.

666502164405 is an abundant number, since it is smaller than the sum of its proper divisors (838705164363).

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

666502164405 is a wasteful number, since it uses less digits than its factorization.

666502164405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95296 (or 95293 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

The spelling of 666502164405 in words is "six hundred sixty-six billion, five hundred two million, one hundred sixty-four thousand, four hundred five".