664473 has 8 divisors (see below), whose sum is σ = 900736. Its totient is φ = 435600.

The previous prime is 664471. The next prime is 664507. The reversal of 664473 is 374466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 664473 - 2¹ = 664471 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 664473.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 664473.

It is not an unprimeable number, because it can be changed into a prime (664471) 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, 1633 + ... + 1998.

It is an arithmetic number, because the mean of its divisors is an integer number (112592).

2⁶⁶⁴⁴⁷³ is an apocalyptic number.

It is an amenable number.

664473 is a deficient number, since it is larger than the sum of its proper divisors (236263).

664473 is a wasteful number, since it uses less digits than its factorization.

664473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3695.

The product of its digits is 12096, while the sum is 30.

The square root of 664473 is about 815.1521330402. The cubic root of 664473 is about 87.2621239683.

The spelling of 664473 in words is "six hundred sixty-four thousand, four hundred seventy-three".