660436053121 has 8 divisors (see below), whose sum is σ = 711289038824. Its totient is φ = 609590240640.

The previous prime is 660436053119. The next prime is 660436053127. The reversal of 660436053121 is 121350634066.

It can be written as a sum of positive squares in 4 ways, for example, as 35449358400 + 624986694721 = 188280^2 + 790561^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 660436053121 - 2¹ = 660436053119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (660436053127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1601316 + ... + 1971061.

It is an arithmetic number, because the mean of its divisors is an integer number (88911129853).

Almost surely, 2^660436053121 is an apocalyptic number.

It is an amenable number.

660436053121 is a deficient number, since it is larger than the sum of its proper divisors (50852985703).

660436053121 is a wasteful number, since it uses less digits than its factorization.

660436053121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3586611.

The product of its (nonzero) digits is 77760, while the sum is 37.

Adding to 660436053121 its reverse (121350634066), we get a palindrome (781786687187).

The spelling of 660436053121 in words is "six hundred sixty billion, four hundred thirty-six million, fifty-three thousand, one hundred twenty-one".