664838383 has 8 divisors (see below), whose sum is σ = 734017536. Its totient is φ = 597115800.

The previous prime is 664838371. The next prime is 664838417. The reversal of 664838383 is 383838466.

664838383 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 664838383 - 2²⁹ = 127967471 is a prime.

It is a Duffinian number.

664838383 is a modest number, since divided by 838383 gives 664 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664838333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 363183 + ... + 365008.

It is an arithmetic number, because the mean of its divisors is an integer number (91752192).

Almost surely, 2^664838383 is an apocalyptic number.

664838383 is a deficient number, since it is larger than the sum of its proper divisors (69179153).

664838383 is a wasteful number, since it uses less digits than its factorization.

664838383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728285.

The product of its digits is 1990656, while the sum is 49.

The square root of 664838383 is about 25784.4601068163. The cubic root of 664838383 is about 872.7811571623.

It can be divided in two parts, 6648383 and 83, that added together give a palindrome (6648466).

The spelling of 664838383 in words is "six hundred sixty-four million, eight hundred thirty-eight thousand, three hundred eighty-three".