666841348105 has 16 divisors (see below), whose sum is σ = 827952382800. Its totient is φ = 514984538880.

The previous prime is 666841348087. The next prime is 666841348109. The reversal of 666841348105 is 501843148666.

It can be written as a sum of positive squares in 8 ways, for example, as 142969849 + 666698378256 = 11957^2 + 816516^2 .

It is not a de Polignac number, because 666841348105 - 2²³ = 666832959497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (666841348109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 397231 + ... + 1221259.

It is an arithmetic number, because the mean of its divisors is an integer number (51747023925).

Almost surely, 2^666841348105 is an apocalyptic number.

It is an amenable number.

666841348105 is a deficient number, since it is larger than the sum of its proper divisors (161111034695).

666841348105 is a wasteful number, since it uses less digits than its factorization.

666841348105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829644.

The product of its (nonzero) digits is 3317760, while the sum is 52.

The spelling of 666841348105 in words is "six hundred sixty-six billion, eight hundred forty-one million, three hundred forty-eight thousand, one hundred five".