664108368 has 320 divisors, whose sum is σ = 2309376000. Its totient is φ = 162570240.

The previous prime is 664108351. The next prime is 664108397. The reversal of 664108368 is 863801466.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3440880 + ... + 3441072.

It is an arithmetic number, because the mean of its divisors is an integer number (7216800).

Almost surely, 2^664108368 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 664108368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1154688000).

664108368 is an abundant number, since it is smaller than the sum of its proper divisors (1645267632).

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

664108368 is a wasteful number, since it uses less digits than its factorization.

664108368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255 (or 235 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 664108368 is about 25770.3001146669. The cubic root of 664108368 is about 872.4615924396.

The spelling of 664108368 in words is "six hundred sixty-four million, one hundred eight thousand, three hundred sixty-eight".