664852668 has 24 divisors (see below), whose sum is σ = 1551774672. Its totient is φ = 221553024.

The previous prime is 664852649. The next prime is 664852673. The reversal of 664852668 is 866258466.

664852668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 664852668.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53896 + ... + 65072.

It is an arithmetic number, because the mean of its divisors is an integer number (64657278).

Almost surely, 2^664852668 is an apocalyptic number.

It is an amenable number.

664852668 is an abundant number, since it is smaller than the sum of its proper divisors (886922004).

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

664852668 is a wasteful number, since it uses less digits than its factorization.

664852668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16141 (or 16139 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 51.

The square root of 664852668 is about 25784.7371132614. The cubic root of 664852668 is about 872.7874080998.

The spelling of 664852668 in words is "six hundred sixty-four million, eight hundred fifty-two thousand, six hundred sixty-eight".