660733 has 2 divisors, whose sum is σ = 660734. Its totient is φ = 660732.

The previous prime is 660731. The next prime is 660757. The reversal of 660733 is 337066.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 580644 + 80089 = 762^2 + 283^2 .

It is a cyclic number.

It is not a de Polignac number, because 660733 - 2¹ = 660731 is a prime.

Together with 660731, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 660698 and 660707.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660731) 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, 330366 + 330367.

It is an arithmetic number, because the mean of its divisors is an integer number (330367).

2⁶⁶⁰⁷³³ is an apocalyptic number.

It is an amenable number.

660733 is a deficient number, since it is larger than the sum of its proper divisors (1).

660733 is an equidigital number, since it uses as much as digits as its factorization.

660733 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 25.

The square root of 660733 is about 812.8548455905. The cubic root of 660733 is about 87.0980969503.

Adding to 660733 its reverse (337066), we get a palindrome (997799).

The spelling of 660733 in words is "six hundred sixty thousand, seven hundred thirty-three".