666050611605 has 8 divisors (see below), whose sum is σ = 1065680978592. Its totient is φ = 355226992848.

The previous prime is 666050611561. The next prime is 666050611619. The reversal of 666050611605 is 506116050666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 666050611605 - 2⁷ = 666050611477 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22201687039 + ... + 22201687068.

It is an arithmetic number, because the mean of its divisors is an integer number (133210122324).

Almost surely, 2^666050611605 is an apocalyptic number.

It is an amenable number.

666050611605 is a deficient number, since it is larger than the sum of its proper divisors (399630366987).

666050611605 is a wasteful number, since it uses less digits than its factorization.

666050611605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44403374115.

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 666050611605 in words is "six hundred sixty-six billion, fifty million, six hundred eleven thousand, six hundred five".