665130636612301 has 4 divisors (see below), whose sum is σ = 665130715704604. Its totient is φ = 665130557520000.

The previous prime is 665130636612223. The next prime is 665130636612311. The reversal of 665130636612301 is 103216636031566.

It is a happy number.

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 351899893410025 + 313230743202276 = 18758995^2 + 17698326^2 .

It is a cyclic number.

It is not a de Polignac number, because 665130636612301 - 2⁹ = 665130636611789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665130636612311) 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, 25196100 + ... + 44329501.

It is an arithmetic number, because the mean of its divisors is an integer number (166282678926151).

Almost surely, 2^{665130636612301} is an apocalyptic number.

It is an amenable number.

665130636612301 is a deficient number, since it is larger than the sum of its proper divisors (79092303).

665130636612301 is an equidigital number, since it uses as much as digits as its factorization.

665130636612301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79092302.

The product of its (nonzero) digits is 2099520, while the sum is 49.

The spelling of 665130636612301 in words is "six hundred sixty-five trillion, one hundred thirty billion, six hundred thirty-six million, six hundred twelve thousand, three hundred one".