668853025 has 6 divisors (see below), whose sum is σ = 829377782. Its totient is φ = 535082400.

The previous prime is 668853023. The next prime is 668853047. The reversal of 668853025 is 520358866.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 51380224 + 617472801 = 7168^2 + 24849^2 .

It is not a de Polignac number, because 668853025 - 2¹ = 668853023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668853023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13377036 + ... + 13377085.

Almost surely, 2^668853025 is an apocalyptic number.

It is an amenable number.

668853025 is a deficient number, since it is larger than the sum of its proper divisors (160524757).

668853025 is a wasteful number, since it uses less digits than its factorization.

668853025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26754131 (or 26754126 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 43.

The square root of 668853025 is about 25862.1929657947. The cubic root of 668853025 is about 874.5344026345.

The spelling of 668853025 in words is "six hundred sixty-eight million, eight hundred fifty-three thousand, twenty-five".