66170539 has 2 divisors, whose sum is σ = 66170540. Its totient is φ = 66170538.

The previous prime is 66170519. The next prime is 66170569. The reversal of 66170539 is 93507166.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66170539 - 2⁷ = 66170411 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66170498 and 66170507.

It is not a weakly prime, because it can be changed into another prime (66170519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33085269 + 33085270.

It is an arithmetic number, because the mean of its divisors is an integer number (33085270).

Almost surely, 2^66170539 is an apocalyptic number.

66170539 is a deficient number, since it is larger than the sum of its proper divisors (1).

66170539 is an equidigital number, since it uses as much as digits as its factorization.

66170539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 66170539 is about 8134.5275830868. The cubic root of 66170539 is about 404.4717779604.

The spelling of 66170539 in words is "sixty-six million, one hundred seventy thousand, five hundred thirty-nine".