660441 has 4 divisors (see below), whose sum is σ = 880592. Its totient is φ = 440292.

The previous prime is 660409. The next prime is 660449. The reversal of 660441 is 144066.

660441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 660441 - 2⁵ = 660409 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110071 + ... + 110076.

It is an arithmetic number, because the mean of its divisors is an integer number (220148).

2⁶⁶⁰⁴⁴¹ is an apocalyptic number.

It is an amenable number.

660441 is a deficient number, since it is larger than the sum of its proper divisors (220151).

660441 is a wasteful number, since it uses less digits than its factorization.

660441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220150.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 660441 is about 812.6752118774. The cubic root of 660441 is about 87.0852645395.

The spelling of 660441 in words is "six hundred sixty thousand, four hundred forty-one".