660142313231 has 6 divisors (see below), whose sum is σ = 662916029232. Its totient is φ = 657380154620.

The previous prime is 660142313147. The next prime is 660142313239. The reversal of 660142313231 is 132313241066.

It is a de Polignac number, because none of the positive numbers 2^k-660142313231 is a prime.

It is a super-2 number, since 2×660142313231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660142313239) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5721335 + ... + 5835576.

It is an arithmetic number, because the mean of its divisors is an integer number (110486004872).

Almost surely, 2^660142313231 is an apocalyptic number.

660142313231 is a deficient number, since it is larger than the sum of its proper divisors (2773716001).

660142313231 is an equidigital number, since it uses as much as digits as its factorization.

660142313231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11557389 (or 11557150 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

Adding to 660142313231 its reverse (132313241066), we get a palindrome (792455554297).

The spelling of 660142313231 in words is "six hundred sixty billion, one hundred forty-two million, three hundred thirteen thousand, two hundred thirty-one".