666028 has 12 divisors (see below), whose sum is σ = 1271592. Its totient is φ = 302720.

The previous prime is 666023. The next prime is 666031. The reversal of 666028 is 820666.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 665987 and 666005.

It is not an unprimeable number, because it can be changed into a prime (666023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7525 + ... + 7612.

It is an arithmetic number, because the mean of its divisors is an integer number (105966).

2⁶⁶⁶⁰²⁸ is an apocalyptic number.

It is an amenable number.

666028 is a deficient number, since it is larger than the sum of its proper divisors (605564).

666028 is a wasteful number, since it uses less digits than its factorization.

666028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15152 (or 15150 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 666028 is about 816.1053853517. The cubic root of 666028 is about 87.3301412245.

The spelling of 666028 in words is "six hundred sixty-six thousand, twenty-eight".