660853 has 2 divisors, whose sum is σ = 660854. Its totient is φ = 660852.

The previous prime is 660851. The next prime is 660887. The reversal of 660853 is 358066.

660853 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 651249 + 9604 = 807^2 + 98^2 .

It is a cyclic number.

It is not a de Polignac number, because 660853 - 2¹ = 660851 is a prime.

Together with 660851, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330426 + 330427.

It is an arithmetic number, because the mean of its divisors is an integer number (330427).

2⁶⁶⁰⁸⁵³ is an apocalyptic number.

It is an amenable number.

660853 is a deficient number, since it is larger than the sum of its proper divisors (1).

660853 is an equidigital number, since it uses as much as digits as its factorization.

660853 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 660853 is about 812.9286561562. The cubic root of 660853 is about 87.1033694476.

The spelling of 660853 in words is "six hundred sixty thousand, eight hundred fifty-three".