660799 has 2 divisors, whose sum is σ = 660800.
Its totient is φ = 660798.
The previous prime is 660791. The next prime is 660809. The reversal of 660799 is 997066.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 660799 - 23 = 660791 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (660791) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330399 + 330400.
It is an arithmetic number, because the mean of its divisors is an integer number (330400).
2660799 is an apocalyptic number.
660799 is a deficient number, since it is larger than the sum of its proper divisors (1).
660799 is an equidigital number, since it uses as much as digits as its factorization.
660799 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 20412, while the sum is 37.
The square root of 660799 is about 812.8954422310.
The cubic root of 660799 is about 87.1009969028.
The spelling of 660799 in words is "six hundred sixty thousand, seven hundred ninety-nine".