660131011 has 4 divisors (see below), whose sum is σ = 660182400. Its totient is φ = 660079624.

The previous prime is 660131009. The next prime is 660131039. The reversal of 660131011 is 110131066.

660131011 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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 660131011 - 2¹ = 660131009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 660131011.

It is not an unprimeable number, because it can be changed into a prime (660131071) 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, 12510 + ... + 38428.

It is an arithmetic number, because the mean of its divisors is an integer number (165045600).

Almost surely, 2^660131011 is an apocalyptic number.

660131011 is a deficient number, since it is larger than the sum of its proper divisors (51389).

660131011 is a wasteful number, since it uses less digits than its factorization.

660131011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51388.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 660131011 is about 25693.0148289375. The cubic root of 660131011 is about 870.7163743342.

Adding to 660131011 its reverse (110131066), we get a palindrome (770262077).

Subtracting from 660131011 its reverse (110131066), we obtain a palindrome (549999945).

The spelling of 660131011 in words is "six hundred sixty million, one hundred thirty-one thousand, eleven".