664175 has 12 divisors (see below), whose sum is σ = 851136. Its totient is φ = 513600.

The previous prime is 664151. The next prime is 664177. The reversal of 664175 is 571466.

664175 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-664175 is a prime.

It is a super-2 number, since 2×664175² = 882256861250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 664175.

It is not an unprimeable number, because it can be changed into a prime (664177) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 347 + ... + 1203.

It is an arithmetic number, because the mean of its divisors is an integer number (70928).

2⁶⁶⁴¹⁷⁵ is an apocalyptic number.

664175 is a deficient number, since it is larger than the sum of its proper divisors (186961).

664175 is a wasteful number, since it uses less digits than its factorization.

664175 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898 (or 893 counting only the distinct ones).

The product of its digits is 5040, while the sum is 29.

The square root of 664175 is about 814.9693245761. The cubic root of 664175 is about 87.2490770367.

The spelling of 664175 in words is "six hundred sixty-four thousand, one hundred seventy-five".