131666320741 has 16 divisors (see below), whose sum is σ = 133223563264. Its totient is φ = 130118171904.

The previous prime is 131666320711. The next prime is 131666320769. The reversal of 131666320741 is 147023666131.

It is a cyclic number.

It is not a de Polignac number, because 131666320741 - 2¹³ = 131666312549 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131666320694 and 131666320703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131666320711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61439116 + ... + 61441258.

It is an arithmetic number, because the mean of its divisors is an integer number (8326472704).

Almost surely, 2^131666320741 is an apocalyptic number.

It is an amenable number.

131666320741 is a deficient number, since it is larger than the sum of its proper divisors (1557242523).

131666320741 is a wasteful number, since it uses less digits than its factorization.

131666320741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3940.

The product of its (nonzero) digits is 108864, while the sum is 40.

Adding to 131666320741 its reverse (147023666131), we get a palindrome (278689986872).

The spelling of 131666320741 in words is "one hundred thirty-one billion, six hundred sixty-six million, three hundred twenty thousand, seven hundred forty-one".