660041 has 4 divisors (see below), whose sum is σ = 694800. Its totient is φ = 625284.

The previous prime is 660029. The next prime is 660047. The reversal of 660041 is 140066.

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 a cyclic number.

It is not a de Polignac number, because 660041 - 2¹⁸ = 397897 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660047) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 17351 + ... + 17388.

It is an arithmetic number, because the mean of its divisors is an integer number (173700).

2⁶⁶⁰⁰⁴¹ is an apocalyptic number.

It is an amenable number.

660041 is a deficient number, since it is larger than the sum of its proper divisors (34759).

660041 is a wasteful number, since it uses less digits than its factorization.

660041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34758.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 660041 is about 812.4290738274. The cubic root of 660041 is about 87.0676797537.

The spelling of 660041 in words is "six hundred sixty thousand, forty-one".