664270 has 16 divisors (see below), whose sum is σ = 1205568. Its totient is φ = 263520.

The previous prime is 664253. The next prime is 664271. The reversal of 664270 is 72466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664271) 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, 1627 + ... + 1993.

It is an arithmetic number, because the mean of its divisors is an integer number (75348).

2⁶⁶⁴²⁷⁰ is an apocalyptic number.

664270 is a deficient number, since it is larger than the sum of its proper divisors (541298).

664270 is a wasteful number, since it uses less digits than its factorization.

664270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555.

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

The square root of 664270 is about 815.0276068944. The cubic root of 664270 is about 87.2532367171.

The spelling of 664270 in words is "six hundred sixty-four thousand, two hundred seventy".