6640383 has 4 divisors (see below), whose sum is σ = 8853848. Its totient is φ = 4426920.

The previous prime is 6640373. The next prime is 6640393. The reversal of 6640383 is 3830466.

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

It is an interprime number because it is at equal distance from previous prime (6640373) and next prime (6640393).

It is not a de Polignac number, because 6640383 - 2¹⁶ = 6574847 is a prime.

It is a D-number.

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 6640383.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6640373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1106728 + ... + 1106733.

It is an arithmetic number, because the mean of its divisors is an integer number (2213462).

Almost surely, 2^6640383 is an apocalyptic number.

6640383 is a deficient number, since it is larger than the sum of its proper divisors (2213465).

6640383 is a wasteful number, since it uses less digits than its factorization.

6640383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2213464.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 6640383 is about 2576.8940606862. The cubic root of 6640383 is about 187.9595412408.

The spelling of 6640383 in words is "six million, six hundred forty thousand, three hundred eighty-three".