666001028 has 48 divisors (see below), whose sum is σ = 1486915584. Its totient is φ = 253441440.

The previous prime is 666001019. The next prime is 666001031. The reversal of 666001028 is 820100666.

666001028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11900 + ... + 38387.

It is an arithmetic number, because the mean of its divisors is an integer number (30977408).

Almost surely, 2^666001028 is an apocalyptic number.

It is an amenable number.

666001028 is an abundant number, since it is smaller than the sum of its proper divisors (820914556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666001028 is a wasteful number, since it uses less digits than its factorization.

666001028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50352 (or 50350 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 666001028 is about 25806.9957182156. The cubic root of 666001028 is about 873.2896234493.

The spelling of 666001028 in words is "six hundred sixty-six million, one thousand, twenty-eight".