66131334144531 has 12 divisors (see below), whose sum is σ = 95798320744152. Its totient is φ = 43960502618496.

The previous prime is 66131334144529. The next prime is 66131334144553. The reversal of 66131334144531 is 13544143313166.

66131334144531 is a `hidden beast` number, since 6 + 6 + 1 + 3 + 1 + 33 + 41 + 44 + 531 = 666.

It is not a de Polignac number, because 66131334144531 - 2¹ = 66131334144529 is a prime.

It is a super-3 number, since 3×66131334144531³ (a number of 42 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (66131334164531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10587786526 + ... + 10587792771.

It is an arithmetic number, because the mean of its divisors is an integer number (7983193395346).

Almost surely, 2^{66131334144531} is an apocalyptic number.

66131334144531 is a deficient number, since it is larger than the sum of its proper divisors (29666986599621).

66131334144531 is a wasteful number, since it uses less digits than its factorization.

66131334144531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21175579650 (or 21175579647 counting only the distinct ones).

The product of its digits is 933120, while the sum is 45.

Adding to 66131334144531 its reverse (13544143313166), we get a palindrome (79675477457697).

The spelling of 66131334144531 in words is "sixty-six trillion, one hundred thirty-one billion, three hundred thirty-four million, one hundred forty-four thousand, five hundred thirty-one".