664347 has 8 divisors (see below), whose sum is σ = 898560. Its totient is φ = 436520.

The previous prime is 664331. The next prime is 664357. The reversal of 664347 is 743466.

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

It is a cyclic number.

It is not a de Polignac number, because 664347 - 2⁴ = 664331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (664357) 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, 1347 + ... + 1772.

It is an arithmetic number, because the mean of its divisors is an integer number (112320).

2⁶⁶⁴³⁴⁷ is an apocalyptic number.

664347 is a deficient number, since it is larger than the sum of its proper divisors (234213).

664347 is a wasteful number, since it uses less digits than its factorization.

664347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3193.

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

The square root of 664347 is about 815.0748431893. The cubic root of 664347 is about 87.2566079565.

The spelling of 664347 in words is "six hundred sixty-four thousand, three hundred forty-seven".