666506015105 has 16 divisors (see below), whose sum is σ = 926586839424. Its totient is φ = 450771972480.

The previous prime is 666506015051. The next prime is 666506015129. The reversal of 666506015105 is 501510605666.

666506015105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 666506015105 - 2¹⁴ = 666505998721 is a prime.

It is a super-2 number, since 2×666506015105² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130429151 + ... + 130434260.

It is an arithmetic number, because the mean of its divisors is an integer number (57911677464).

Almost surely, 2^666506015105 is an apocalyptic number.

It is an amenable number.

666506015105 is a deficient number, since it is larger than the sum of its proper divisors (260080824319).

666506015105 is a wasteful number, since it uses less digits than its factorization.

666506015105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260863496.

The product of its (nonzero) digits is 162000, while the sum is 41.

The spelling of 666506015105 in words is "six hundred sixty-six billion, five hundred six million, fifteen thousand, one hundred five".