666524112141361 has 4 divisors (see below), whose sum is σ = 666549543283300. Its totient is φ = 666498680999424.

The previous prime is 666524112141347. The next prime is 666524112141413. The reversal of 666524112141361 is 163141211425666.

666524112141361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 314305243566336 + 352218868575025 = 17728656^2 + 18767495^2 .

It is a cyclic number.

It is not a de Polignac number, because 666524112141361 - 2²⁵ = 666524078586929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666524112171361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12715531656 + ... + 12715584073.

It is an arithmetic number, because the mean of its divisors is an integer number (166637385820825).

Almost surely, 2^{666524112141361} is an apocalyptic number.

It is an amenable number.

666524112141361 is a deficient number, since it is larger than the sum of its proper divisors (25431141939).

666524112141361 is a wasteful number, since it uses less digits than its factorization.

666524112141361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25431141938.

The product of its digits is 1244160, while the sum is 49.

The spelling of 666524112141361 in words is "six hundred sixty-six trillion, five hundred twenty-four billion, one hundred twelve million, one hundred forty-one thousand, three hundred sixty-one".