664036422 has 64 divisors (see below), whose sum is σ = 1616993280. Its totient is φ = 177463296.

The previous prime is 664036363. The next prime is 664036433. The reversal of 664036422 is 224630466.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 116454 + ... + 122022.

It is an arithmetic number, because the mean of its divisors is an integer number (25265520).

Almost surely, 2^664036422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 664036422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (808496640).

664036422 is an abundant number, since it is smaller than the sum of its proper divisors (952956858).

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

664036422 is a wasteful number, since it uses less digits than its factorization.

664036422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5765.

The product of its (nonzero) digits is 41472, while the sum is 33.

The square root of 664036422 is about 25768.9041676203. The cubic root of 664036422 is about 872.4300853385.

Adding to 664036422 its reverse (224630466), we get a palindrome (888666888).

The spelling of 664036422 in words is "six hundred sixty-four million, thirty-six thousand, four hundred twenty-two".