664120 has 16 divisors (see below), whose sum is σ = 1494360. Its totient is φ = 265632.

The previous prime is 664117. The next prime is 664121. The reversal of 664120 is 21466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8262 + ... + 8341.

2⁶⁶⁴¹²⁰ is an apocalyptic number.

It is an amenable number.

664120 is an abundant number, since it is smaller than the sum of its proper divisors (830240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664120 is a wasteful number, since it uses less digits than its factorization.

664120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16614 (or 16610 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 664120 is about 814.9355802761. The cubic root of 664120 is about 87.2466686194.

Adding to 664120 its reverse (21466), we get a palindrome (685586).

It can be divided in two parts, 664 and 120, that added together give a square (784 = 28²).

The spelling of 664120 in words is "six hundred sixty-four thousand, one hundred twenty".