6643026 has 32 divisors (see below), whose sum is σ = 15899520. Its totient is φ = 2043792.

The previous prime is 6643019. The next prime is 6643033. The reversal of 6643026 is 6203466.

It is an interprime number because it is at equal distance from previous prime (6643019) and next prime (6643033).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4030 + ... + 5433.

It is an arithmetic number, because the mean of its divisors is an integer number (496860).

Almost surely, 2^6643026 is an apocalyptic number.

6643026 is an abundant number, since it is smaller than the sum of its proper divisors (9256494).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6643026 is a wasteful number, since it uses less digits than its factorization.

6643026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9487 (or 9481 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 6643026 is about 2577.4068363376. The cubic root of 6643026 is about 187.9844751025.

The spelling of 6643026 in words is "six million, six hundred forty-three thousand, twenty-six".