660087 has 12 divisors (see below), whose sum is σ = 967824. Its totient is φ = 433440.

The previous prime is 660073. The next prime is 660097. The reversal of 660087 is 780066.

660087 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 660087 - 2⁴ = 660071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 660087.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 660087.

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

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 123 + ... + 1155.

It is an arithmetic number, because the mean of its divisors is an integer number (80652).

2⁶⁶⁰⁰⁸⁷ is an apocalyptic number.

660087 is a deficient number, since it is larger than the sum of its proper divisors (307737).

660087 is a wasteful number, since it uses less digits than its factorization.

660087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110 (or 1107 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 660087 is about 812.4573834977. The cubic root of 660087 is about 87.0697023655.

The spelling of 660087 in words is "six hundred sixty thousand, eighty-seven".