6642486 has 40 divisors (see below), whose sum is σ = 15045624. Its totient is φ = 2190240.

The previous prime is 6642439. The next prime is 6642487. The reversal of 6642486 is 6842466.

It is a happy number.

6642486 is a `hidden beast` number, since 6 + 642 + 4 + 8 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 6642486.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6642487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 21066 + ... + 21378.

Almost surely, 2^6642486 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6642486, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7522812).

6642486 is an abundant number, since it is smaller than the sum of its proper divisors (8403138).

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

6642486 is a wasteful number, since it uses less digits than its factorization.

6642486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458 (or 449 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 6642486 is about 2577.3020777550. The cubic root of 6642486 is about 187.9793813211.

The spelling of 6642486 in words is "six million, six hundred forty-two thousand, four hundred eighty-six".