66006539 has 2 divisors, whose sum is σ = 66006540. Its totient is φ = 66006538.

The previous prime is 66006517. The next prime is 66006547. The reversal of 66006539 is 93560066.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66006539 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 66006499 and 66006508.

It is not a weakly prime, because it can be changed into another prime (66006559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33003269 + 33003270.

It is an arithmetic number, because the mean of its divisors is an integer number (33003270).

Almost surely, 2^66006539 is an apocalyptic number.

66006539 is a deficient number, since it is larger than the sum of its proper divisors (1).

66006539 is an equidigital number, since it uses as much as digits as its factorization.

66006539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 35.

The square root of 66006539 is about 8124.4408422980. The cubic root of 66006539 is about 404.1373479187.

The spelling of 66006539 in words is "sixty-six million, six thousand, five hundred thirty-nine".