66165703 has 2 divisors, whose sum is σ = 66165704. Its totient is φ = 66165702.

The previous prime is 66165689. The next prime is 66165713. The reversal of 66165703 is 30756166.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66165703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66165713) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33082851 + 33082852.

It is an arithmetic number, because the mean of its divisors is an integer number (33082852).

Almost surely, 2^66165703 is an apocalyptic number.

66165703 is a deficient number, since it is larger than the sum of its proper divisors (1).

66165703 is an equidigital number, since it uses as much as digits as its factorization.

66165703 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 66165703 is about 8134.2303262202. The cubic root of 66165703 is about 404.4619242642.

The spelling of 66165703 in words is "sixty-six million, one hundred sixty-five thousand, seven hundred three".