664207 has 8 divisors (see below), whose sum is σ = 712800. Its totient is φ = 616704.

The previous prime is 664199. The next prime is 664211. The reversal of 664207 is 702466.

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 664207 - 2³ = 664199 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664507) 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, 1294 + ... + 1732.

It is an arithmetic number, because the mean of its divisors is an integer number (89100).

2⁶⁶⁴²⁰⁷ is an apocalyptic number.

664207 is a deficient number, since it is larger than the sum of its proper divisors (48593).

664207 is a wasteful number, since it uses less digits than its factorization.

664207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 664207 is about 814.9889569804. The cubic root of 664207 is about 87.2504782365.

The spelling of 664207 in words is "six hundred sixty-four thousand, two hundred seven".