666063 has 12 divisors (see below), whose sum is σ = 998088. Its totient is φ = 443880.

The previous prime is 666041. The next prime is 666067. The reversal of 666063 is 360666.

It is not a de Polignac number, because 666063 - 2⁵ = 666031 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666067) 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 in 11 ways as a sum of consecutive naturals, for example, 1128 + ... + 1613.

It is an arithmetic number, because the mean of its divisors is an integer number (83174).

2⁶⁶⁶⁰⁶³ is an apocalyptic number.

666063 is a deficient number, since it is larger than the sum of its proper divisors (332025).

666063 is an equidigital number, since it uses as much as digits as its factorization.

666063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2756 (or 2744 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 666063 is about 816.1268283790. The cubic root of 666063 is about 87.3316709407.

The spelling of 666063 in words is "six hundred sixty-six thousand, sixty-three".