6643862 has 8 divisors (see below), whose sum is σ = 9985656. Its totient is φ = 3315312.

The previous prime is 6643859. The next prime is 6643883. The reversal of 6643862 is 2683466.

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

It is a plaindrome in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1943 + ... + 4130.

It is an arithmetic number, because the mean of its divisors is an integer number (1248207).

Almost surely, 2^6643862 is an apocalyptic number.

6643862 is a deficient number, since it is larger than the sum of its proper divisors (3341794).

6643862 is a wasteful number, since it uses less digits than its factorization.

6643862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6622.

The product of its digits is 41472, while the sum is 35.

The square root of 6643862 is about 2577.5690097454. The cubic root of 6643862 is about 187.9923604863.

The spelling of 6643862 in words is "six million, six hundred forty-three thousand, eight hundred sixty-two".