660827 has 4 divisors (see below), whose sum is σ = 682176. Its totient is φ = 639480.

The previous prime is 660817. The next prime is 660833. The reversal of 660827 is 728066.

660827 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.

It is a cyclic number.

It is not a de Polignac number, because 660827 - 2⁴ = 660811 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 660827.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 660827.

It is not an unprimeable number, because it can be changed into a prime (660817) 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, 10628 + ... + 10689.

It is an arithmetic number, because the mean of its divisors is an integer number (170544).

2⁶⁶⁰⁸²⁷ is an apocalyptic number.

660827 is a deficient number, since it is larger than the sum of its proper divisors (21349).

660827 is a wasteful number, since it uses less digits than its factorization.

660827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21348.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 660827 is about 812.9126644357. The cubic root of 660827 is about 87.1022271274.

The spelling of 660827 in words is "six hundred sixty thousand, eight hundred twenty-seven".