666753 has 8 divisors (see below), whose sum is σ = 897600. Its totient is φ = 440208.

The previous prime is 666751. The next prime is 666769. The reversal of 666753 is 357666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 666753 - 2¹ = 666751 is a prime.

It is not an unprimeable number, because it can be changed into a prime (666751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 693 + ... + 1346.

It is an arithmetic number, because the mean of its divisors is an integer number (112200).

2⁶⁶⁶⁷⁵³ is an apocalyptic number.

It is an amenable number.

666753 is a deficient number, since it is larger than the sum of its proper divisors (230847).

666753 is a wasteful number, since it uses less digits than its factorization.

666753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2151.

The product of its digits is 22680, while the sum is 33.

The square root of 666753 is about 816.5494473698. The cubic root of 666753 is about 87.3618172665.

The spelling of 666753 in words is "six hundred sixty-six thousand, seven hundred fifty-three".