66833393 has 16 divisors (see below), whose sum is σ = 77630400. Its totient is φ = 56897280.

The previous prime is 66833381. The next prime is 66833401. The reversal of 66833393 is 39333866.

It is a de Polignac number, because none of the positive numbers 2^k-66833393 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 66833393.

It is not an unprimeable number, because it can be changed into a prime (66833363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16805 + ... + 20397.

It is an arithmetic number, because the mean of its divisors is an integer number (4851900).

Almost surely, 2^66833393 is an apocalyptic number.

It is an amenable number.

66833393 is a deficient number, since it is larger than the sum of its proper divisors (10797007).

66833393 is a wasteful number, since it uses less digits than its factorization.

66833393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3712.

The product of its digits is 209952, while the sum is 41.

The square root of 66833393 is about 8175.1692948831. The cubic root of 66833393 is about 405.8178727231.

The spelling of 66833393 in words is "sixty-six million, eight hundred thirty-three thousand, three hundred ninety-three".