66430805 has 8 divisors (see below), whose sum is σ = 91105152. Its totient is φ = 45552528.

The previous prime is 66430759. The next prime is 66430811. The reversal of 66430805 is 50803466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66430805 - 2¹² = 66426709 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 948977 + ... + 949046.

It is an arithmetic number, because the mean of its divisors is an integer number (11388144).

Almost surely, 2^66430805 is an apocalyptic number.

It is an amenable number.

66430805 is a deficient number, since it is larger than the sum of its proper divisors (24674347).

66430805 is a wasteful number, since it uses less digits than its factorization.

66430805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1898035.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 66430805 is about 8150.5094932771. The cubic root of 66430805 is about 405.0013818984.

The spelling of 66430805 in words is "sixty-six million, four hundred thirty thousand, eight hundred five".