66334643 has 8 divisors (see below), whose sum is σ = 70257600. Its totient is φ = 62454888.

The previous prime is 66334627. The next prime is 66334669. The reversal of 66334643 is 34643366.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 66334643 - 2⁴ = 66334627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66334043) 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 7 ways as a sum of consecutive naturals, for example, 7613 + ... + 13806.

It is an arithmetic number, because the mean of its divisors is an integer number (8782200).

Almost surely, 2^66334643 is an apocalyptic number.

66334643 is a deficient number, since it is larger than the sum of its proper divisors (3922957).

66334643 is a wasteful number, since it uses less digits than its factorization.

66334643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21601.

The product of its digits is 93312, while the sum is 35.

The square root of 66334643 is about 8144.6082164829. The cubic root of 66334643 is about 404.8058674329.

The spelling of 66334643 in words is "sixty-six million, three hundred thirty-four thousand, six hundred forty-three".