664063028 has 24 divisors (see below), whose sum is σ = 1200751104. Its totient is φ = 321012000.

The previous prime is 664063021. The next prime is 664063031. The reversal of 664063028 is 820360466.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664063021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177578 + ... + 181278.

It is an arithmetic number, because the mean of its divisors is an integer number (50031296).

Almost surely, 2^664063028 is an apocalyptic number.

It is an amenable number.

664063028 is a deficient number, since it is larger than the sum of its proper divisors (536688076).

664063028 is a wasteful number, since it uses less digits than its factorization.

664063028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5183 (or 5181 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 664063028 is about 25769.4204048131. The cubic root of 664063028 is about 872.4417370913.

The spelling of 664063028 in words is "six hundred sixty-four million, sixty-three thousand, twenty-eight".