131666320740 has 48 divisors (see below), whose sum is σ = 368684027712. Its totient is φ = 35109273216.

The previous prime is 131666320711. The next prime is 131666320769. The reversal of 131666320740 is 47023666131.

131666320740 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (131666320711) and next prime (131666320769).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1554567 + ... + 1637073.

It is an arithmetic number, because the mean of its divisors is an integer number (7680917244).

Almost surely, 2^131666320740 is an apocalyptic number.

131666320740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131666320740 is an abundant number, since it is smaller than the sum of its proper divisors (237017706972).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131666320740 is a wasteful number, since it uses less digits than its factorization.

131666320740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109116 (or 109114 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 39.

Adding to 131666320740 its reverse (47023666131), we get a palindrome (178689986871).

The spelling of 131666320740 in words is "one hundred thirty-one billion, six hundred sixty-six million, three hundred twenty thousand, seven hundred forty".