666343615105 has 16 divisors (see below), whose sum is σ = 913874189184. Its totient is φ = 456905577600.

The previous prime is 666343615099. The next prime is 666343615111. The reversal of 666343615105 is 501516343666.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (666343615099) and next prime (666343615111).

It is not a de Polignac number, because 666343615105 - 2²⁵ = 666310060673 is a prime.

It is a super-2 number, since 2×666343615105² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 751005 + ... + 1377205.

It is an arithmetic number, because the mean of its divisors is an integer number (57117136824).

Almost surely, 2^666343615105 is an apocalyptic number.

It is an amenable number.

666343615105 is a deficient number, since it is larger than the sum of its proper divisors (247530574079).

666343615105 is a wasteful number, since it uses less digits than its factorization.

666343615105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656616.

The product of its (nonzero) digits is 1166400, while the sum is 46.

The spelling of 666343615105 in words is "six hundred sixty-six billion, three hundred forty-three million, six hundred fifteen thousand, one hundred five".