6642500 has 30 divisors (see below), whose sum is σ = 14531286. Its totient is φ = 2656000.

The previous prime is 6642497. The next prime is 6642521. The reversal of 6642500 is 52466.

It can be written as a sum of positive squares in 5 ways, for example, as 2114116 + 4528384 = 1454^2 + 2128^2 .

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 9 ways as a sum of consecutive naturals, for example, 1172 + ... + 3828.

Almost surely, 2^6642500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6642500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7265643).

6642500 is an abundant number, since it is smaller than the sum of its proper divisors (7888786).

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

6642500 is a wasteful number, since it uses less digits than its factorization.

6642500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2681 (or 2664 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 6642500 is about 2577.3047937720. The cubic root of 6642500 is about 187.9795133856.

Adding to 6642500 its reverse (52466), we get a palindrome (6694966).

The spelling of 6642500 in words is "six million, six hundred forty-two thousand, five hundred".