6643396 has 24 divisors (see below), whose sum is σ = 12410496. Its totient is φ = 3100800.

The previous prime is 6643381. The next prime is 6643411. The reversal of 6643396 is 6933466.

It is an interprime number because it is at equal distance from previous prime (6643381) and next prime (6643411).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9945 + ... + 10591.

It is an arithmetic number, because the mean of its divisors is an integer number (517104).

Almost surely, 2^6643396 is an apocalyptic number.

It is an amenable number.

6643396 is a deficient number, since it is larger than the sum of its proper divisors (5767100).

6643396 is a wasteful number, since it uses less digits than its factorization.

6643396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819 (or 817 counting only the distinct ones).

The product of its digits is 69984, while the sum is 37.

The square root of 6643396 is about 2577.4786129084. The cubic root of 6643396 is about 187.9879651267.

The spelling of 6643396 in words is "six million, six hundred forty-three thousand, three hundred ninety-six".