6643450 has 48 divisors (see below), whose sum is σ = 13820544. Its totient is φ = 2355200.

The previous prime is 6643423. The next prime is 6643453. The reversal of 6643450 is 543466.

It is not an unprimeable number, because it can be changed into a prime (6643453) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25722 + ... + 25978.

It is an arithmetic number, because the mean of its divisors is an integer number (287928).

Almost surely, 2^6643450 is an apocalyptic number.

6643450 is an abundant number, since it is smaller than the sum of its proper divisors (7177094).

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

6643450 is a wasteful number, since it uses less digits than its factorization.

6643450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 6643450 is about 2577.4890882407. The cubic root of 6643450 is about 187.9884744707.

It can be divided in two parts, 664 and 3450, that added together give a palindrome (4114).

The spelling of 6643450 in words is "six million, six hundred forty-three thousand, four hundred fifty".