664160 has 48 divisors (see below), whose sum is σ = 1796256. Its totient is φ = 227328.

The previous prime is 664151. The next prime is 664177. The reversal of 664160 is 61466.

664160 = T₃₀₁ + T₃₀₂ + ... + T₃₁₄.

It is a super-2 number, since 2×664160² = 882217011200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

664160 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 824 + ... + 1416.

It is an arithmetic number, because the mean of its divisors is an integer number (37422).

2⁶⁶⁴¹⁶⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 664160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (898128).

664160 is an abundant number, since it is smaller than the sum of its proper divisors (1132096).

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

664160 is a wasteful number, since it uses less digits than its factorization.

664160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615 (or 607 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 664160 is about 814.9601217238. The cubic root of 664160 is about 87.2484202088.

The spelling of 664160 in words is "six hundred sixty-four thousand, one hundred sixty".