66011131 has 2 divisors, whose sum is σ = 66011132. Its totient is φ = 66011130.

The previous prime is 66011123. The next prime is 66011137. The reversal of 66011131 is 13111066.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66011131 - 2³ = 66011123 is a prime.

It is a super-2 number, since 2×66011131² = 8714938831798322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 66011099 and 66011108.

It is not a weakly prime, because it can be changed into another prime (66011137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33005565 + 33005566.

It is an arithmetic number, because the mean of its divisors is an integer number (33005566).

Almost surely, 2^66011131 is an apocalyptic number.

66011131 is a deficient number, since it is larger than the sum of its proper divisors (1).

66011131 is an equidigital number, since it uses as much as digits as its factorization.

66011131 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 66011131 is about 8124.7234414471. The cubic root of 66011131 is about 404.1467194936.

Adding to 66011131 its reverse (13111066), we get a palindrome (79122197).

The spelling of 66011131 in words is "sixty-six million, eleven thousand, one hundred thirty-one".