66330071 has 4 divisors (see below), whose sum is σ = 66364200. Its totient is φ = 66295944.

The previous prime is 66330041. The next prime is 66330109. The reversal of 66330071 is 17003366.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66330071 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66330071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66330001) 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 in 3 ways as a sum of consecutive naturals, for example, 13961 + ... + 18098.

It is an arithmetic number, because the mean of its divisors is an integer number (16591050).

Almost surely, 2^66330071 is an apocalyptic number.

66330071 is a deficient number, since it is larger than the sum of its proper divisors (34129).

66330071 is a wasteful number, since it uses less digits than its factorization.

66330071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34128.

The product of its (nonzero) digits is 2268, while the sum is 26.

The square root of 66330071 is about 8144.3275351621. The cubic root of 66330071 is about 404.7965670389.

The spelling of 66330071 in words is "sixty-six million, three hundred thirty thousand, seventy-one".