6436664 has 32 divisors (see below), whose sum is σ = 13230000. Its totient is φ = 2917632.

The previous prime is 6436663. The next prime is 6436667. The reversal of 6436664 is 4666346.

6436664 is nontrivially palindromic in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6436663) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5612 + ... + 6660.

Almost surely, 2^6436664 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 6436664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6615000).

6436664 is an abundant number, since it is smaller than the sum of its proper divisors (6793336).

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

6436664 is a wasteful number, since it uses less digits than its factorization.

6436664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127 (or 1123 counting only the distinct ones).

The product of its digits is 62208, while the sum is 35.

The square root of 6436664 is about 2537.0581388687. The cubic root of 6436664 is about 186.0174184944.

The spelling of 6436664 in words is "six million, four hundred thirty-six thousand, six hundred sixty-four".