660541 has 8 divisors (see below), whose sum is σ = 760320. Its totient is φ = 562128.

The previous prime is 660529. The next prime is 660547. The reversal of 660541 is 145066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 660541 - 2⁵ = 660509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1140 + ... + 1618.

It is an arithmetic number, because the mean of its divisors is an integer number (95040).

2⁶⁶⁰⁵⁴¹ is an apocalyptic number.

It is an amenable number.

660541 is a deficient number, since it is larger than the sum of its proper divisors (99779).

660541 is a wasteful number, since it uses less digits than its factorization.

660541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 660541 is about 812.7367347426. The cubic root of 660541 is about 87.0896596265.

The spelling of 660541 in words is "six hundred sixty thousand, five hundred forty-one".