666350 has 12 divisors (see below), whose sum is σ = 1239504. Its totient is φ = 266520.

The previous prime is 666329. The next prime is 666353. The reversal of 666350 is 53666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666353) by changing a digit.

666350 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 in 5 ways as a sum of consecutive naturals, for example, 6614 + ... + 6713.

It is an arithmetic number, because the mean of its divisors is an integer number (103292).

2⁶⁶⁶³⁵⁰ is an apocalyptic number.

666350 is a deficient number, since it is larger than the sum of its proper divisors (573154).

666350 is a wasteful number, since it uses less digits than its factorization.

666350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13339 (or 13334 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 666350 is about 816.3026399565. The cubic root of 666350 is about 87.3442125923.

The spelling of 666350 in words is "six hundred sixty-six thousand, three hundred fifty".