664260 has 24 divisors (see below), whose sum is σ = 1860096. Its totient is φ = 177120.

The previous prime is 664253. The next prime is 664271. The reversal of 664260 is 62466.

It is a d-powerful number, because it can be written as 6⁶ + 6⁶ + 2¹⁹ + 4 + 6⁶ + 0 .

It is a self number, because there is not a number n which added to its sum of digits gives 664260.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5476 + ... + 5595.

It is an arithmetic number, because the mean of its divisors is an integer number (77504).

2⁶⁶⁴²⁶⁰ is an apocalyptic number.

664260 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

664260 is an abundant number, since it is smaller than the sum of its proper divisors (1195836).

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

664260 is a wasteful number, since it uses less digits than its factorization.

664260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11083 (or 11081 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 664260 is about 815.0214721098. The cubic root of 664260 is about 87.2527988746.

The spelling of 664260 in words is "six hundred sixty-four thousand, two hundred sixty".