666028768 has 12 divisors (see below), whose sum is σ = 1311244200. Its totient is φ = 333014368.

The previous prime is 666028747. The next prime is 666028789. The reversal of 666028768 is 867820666.

666028768 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (666028747) and next prime (666028789).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10406668 + ... + 10406731.

It is an arithmetic number, because the mean of its divisors is an integer number (109270350).

Almost surely, 2^666028768 is an apocalyptic number.

It is an amenable number.

666028768 is a deficient number, since it is larger than the sum of its proper divisors (645215432).

666028768 is a wasteful number, since it uses less digits than its factorization.

666028768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20813409 (or 20813401 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 49.

The square root of 666028768 is about 25807.5331637877. The cubic root of 666028768 is about 873.3017479140.

The spelling of 666028768 in words is "six hundred sixty-six million, twenty-eight thousand, seven hundred sixty-eight".