660801 has 8 divisors (see below), whose sum is σ = 927520. Its totient is φ = 417312.

The previous prime is 660799. The next prime is 660809. The reversal of 660801 is 108066.

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

It is not a de Polignac number, because 660801 - 2¹ = 660799 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 660801.

It is not an unprimeable number, because it can be changed into a prime (660809) 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 7 ways as a sum of consecutive naturals, for example, 5740 + ... + 5853.

It is an arithmetic number, because the mean of its divisors is an integer number (115940).

2⁶⁶⁰⁸⁰¹ is an apocalyptic number.

It is an amenable number.

660801 is a deficient number, since it is larger than the sum of its proper divisors (266719).

660801 is a wasteful number, since it uses less digits than its factorization.

660801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11615.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 660801 is about 812.8966724006. The cubic root of 660801 is about 87.1010847771.

Adding to 660801 its reverse (108066), we get a palindrome (768867).

The spelling of 660801 in words is "six hundred sixty thousand, eight hundred one".