66110131 has 2 divisors, whose sum is σ = 66110132. Its totient is φ = 66110130.

The previous prime is 66110129. The next prime is 66110141. The reversal of 66110131 is 13101166.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66110131 - 2¹ = 66110129 is a prime.

It is a super-2 number, since 2×66110131² = 8741098841674322, which contains 22 as substring.

Together with 66110129, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 66110099 and 66110108.

It is not a weakly prime, because it can be changed into another prime (66110141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33055065 + 33055066.

It is an arithmetic number, because the mean of its divisors is an integer number (33055066).

Almost surely, 2^66110131 is an apocalyptic number.

66110131 is a deficient number, since it is larger than the sum of its proper divisors (1).

66110131 is an equidigital number, since it uses as much as digits as its factorization.

66110131 is an evil number, because the sum of its binary digits is even.

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

The square root of 66110131 is about 8130.8136739197. The cubic root of 66110131 is about 404.3486578606.

Adding to 66110131 its reverse (13101166), we get a palindrome (79211297).

The spelling of 66110131 in words is "sixty-six million, one hundred ten thousand, one hundred thirty-one".