6642450 has 72 divisors (see below), whose sum is σ = 18497700. Its totient is φ = 1706880.

The previous prime is 6642439. The next prime is 6642487. The reversal of 6642450 is 542466.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 3583449 + 3059001 = 1893^2 + 1749^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 12796 + ... + 13304.

Almost surely, 2^6642450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6642450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9248850).

6642450 is an abundant number, since it is smaller than the sum of its proper divisors (11855250).

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

6642450 is a wasteful number, since it uses less digits than its factorization.

6642450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556 (or 548 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 6642450 is about 2577.2950936980. The cubic root of 6642450 is about 187.9790417258.

The spelling of 6642450 in words is "six million, six hundred forty-two thousand, four hundred fifty".