660887 has 2 divisors, whose sum is σ = 660888. Its totient is φ = 660886.

The previous prime is 660853. The next prime is 660893. The reversal of 660887 is 788066.

660887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 660887 - 2¹⁰ = 659863 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330443 + 330444.

It is an arithmetic number, because the mean of its divisors is an integer number (330444).

2⁶⁶⁰⁸⁸⁷ is an apocalyptic number.

660887 is a deficient number, since it is larger than the sum of its proper divisors (1).

660887 is an equidigital number, since it uses as much as digits as its factorization.

660887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 660887 is about 812.9495679315. The cubic root of 660887 is about 87.1048632058.

The spelling of 660887 in words is "six hundred sixty thousand, eight hundred eighty-seven".