66236430131 has 4 divisors (see below), whose sum is σ = 66238828152. Its totient is φ = 66234032112.

The previous prime is 66236430089. The next prime is 66236430173. The reversal of 66236430131 is 13103463266.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13103463266 = 2 ⋅6551731633.

It is an interprime number because it is at equal distance from previous prime (66236430089) and next prime (66236430173).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66236430131 is a prime.

It is a super-3 number, since 3×66236430131³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66236430091 and 66236430100.

It is not an unprimeable number, because it can be changed into a prime (66236430431) 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, 1157090 + ... + 1212983.

It is an arithmetic number, because the mean of its divisors is an integer number (16559707038).

Almost surely, 2^66236430131 is an apocalyptic number.

66236430131 is a deficient number, since it is larger than the sum of its proper divisors (2398021).

66236430131 is a wasteful number, since it uses less digits than its factorization.

66236430131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2398020.

The product of its (nonzero) digits is 46656, while the sum is 35.

Adding to 66236430131 its reverse (13103463266), we get a palindrome (79339893397).

The spelling of 66236430131 in words is "sixty-six billion, two hundred thirty-six million, four hundred thirty thousand, one hundred thirty-one".