664180 has 24 divisors (see below), whose sum is σ = 1522080. Its totient is φ = 241440.

The previous prime is 664177. The next prime is 664193. The reversal of 664180 is 81466.

It is a super-2 number, since 2×664180² = 882270144800, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1290 + ... + 1729.

It is an arithmetic number, because the mean of its divisors is an integer number (63420).

2⁶⁶⁴¹⁸⁰ is an apocalyptic number.

It is an amenable number.

664180 is an abundant number, since it is smaller than the sum of its proper divisors (857900).

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

664180 is a wasteful number, since it uses less digits than its factorization.

664180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3039 (or 3037 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 664180 is about 814.9723921704. The cubic root of 664180 is about 87.2492959771.

The spelling of 664180 in words is "six hundred sixty-four thousand, one hundred eighty".