668282017 has 4 divisors (see below), whose sum is σ = 719688340. Its totient is φ = 616875696.

The previous prime is 668282009. The next prime is 668282029. The reversal of 668282017 is 710282866.

668282017 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 710282866 = 2 ⋅355141433.

It can be written as a sum of positive squares in 2 ways, for example, as 346294881 + 321987136 = 18609^2 + 17944^2 .

It is a cyclic number.

It is not a de Polignac number, because 668282017 - 2³ = 668282009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668282057) 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, 25703142 + ... + 25703167.

It is an arithmetic number, because the mean of its divisors is an integer number (179922085).

Almost surely, 2^668282017 is an apocalyptic number.

It is an amenable number.

668282017 is a deficient number, since it is larger than the sum of its proper divisors (51406323).

668282017 is a wasteful number, since it uses less digits than its factorization.

668282017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51406322.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 668282017 is about 25851.1511735938. The cubic root of 668282017 is about 874.2854648789.

The spelling of 668282017 in words is "six hundred sixty-eight million, two hundred eighty-two thousand, seventeen".