668514325 has 18 divisors (see below), whose sum is σ = 834457442. Its totient is φ = 531285600.

The previous prime is 668514317. The next prime is 668514347. The reversal of 668514325 is 523415866.

668514325 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 194407249 + 474107076 = 13943^2 + 21774^2 .

It is not a de Polignac number, because 668514325 - 2³ = 668514317 is a prime.

It is a super-2 number, since 2×668514325² = 893822805460411250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 911659 + ... + 912391.

Almost surely, 2^668514325 is an apocalyptic number.

It is an amenable number.

668514325 is a deficient number, since it is larger than the sum of its proper divisors (165943117).

668514325 is an equidigital number, since it uses as much as digits as its factorization.

668514325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1125 (or 929 counting only the distinct ones).

The product of its digits is 172800, while the sum is 40.

The square root of 668514325 is about 25855.6439680005. The cubic root of 668514325 is about 874.3867594286.

The spelling of 668514325 in words is "six hundred sixty-eight million, five hundred fourteen thousand, three hundred twenty-five".