66530141 has 2 divisors, whose sum is σ = 66530142. Its totient is φ = 66530140.

The previous prime is 66530131. The next prime is 66530179. The reversal of 66530141 is 14103566.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41229241 + 25300900 = 6421^2 + 5030^2 .

It is a cyclic number.

It is not a de Polignac number, because 66530141 - 2¹⁰ = 66529117 is a prime.

It is a super-2 number, since 2×66530141² = 8852519322959762, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66530141.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66530131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33265070 + 33265071.

It is an arithmetic number, because the mean of its divisors is an integer number (33265071).

Almost surely, 2^66530141 is an apocalyptic number.

It is an amenable number.

66530141 is a deficient number, since it is larger than the sum of its proper divisors (1).

66530141 is an equidigital number, since it uses as much as digits as its factorization.

66530141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 66530141 is about 8156.6010690728. The cubic root of 66530141 is about 405.2031516493.

The spelling of 66530141 in words is "sixty-six million, five hundred thirty thousand, one hundred forty-one".