664474173 has 32 divisors (see below), whose sum is σ = 981020160. Its totient is φ = 396711360.

The previous prime is 664474171. The next prime is 664474183. The reversal of 664474173 is 371474466.

It is not a de Polignac number, because 664474173 - 2¹ = 664474171 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664474171) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 801123 + ... + 801951.

It is an arithmetic number, because the mean of its divisors is an integer number (30656880).

Almost surely, 2^664474173 is an apocalyptic number.

It is an amenable number.

664474173 is a deficient number, since it is larger than the sum of its proper divisors (316545987).

664474173 is a wasteful number, since it uses less digits than its factorization.

664474173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177.

The product of its digits is 338688, while the sum is 42.

The square root of 664474173 is about 25777.3965520182. The cubic root of 664474173 is about 872.6217531643.

The spelling of 664474173 in words is "six hundred sixty-four million, four hundred seventy-four thousand, one hundred seventy-three".