663168125 has 10 divisors (see below), whose sum is σ = 828695670. Its totient is φ = 530534000.

The previous prime is 663168119. The next prime is 663168127. The reversal of 663168125 is 521861366.

It can be written as a sum of positive squares in 5 ways, for example, as 56580484 + 606587641 = 7522^2 + 24629^2 .

It is not a de Polignac number, because 663168125 - 2⁴ = 663168109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663168127) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 529910 + ... + 531159.

It is an arithmetic number, because the mean of its divisors is an integer number (82869567).

Almost surely, 2^663168125 is an apocalyptic number.

It is an amenable number.

663168125 is a deficient number, since it is larger than the sum of its proper divisors (165527545).

663168125 is an equidigital number, since it uses as much as digits as its factorization.

663168125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061089 (or 1061074 counting only the distinct ones).

The product of its digits is 51840, while the sum is 38.

The square root of 663168125 is about 25752.0508892010. The cubic root of 663168125 is about 872.0496549769.

The spelling of 663168125 in words is "six hundred sixty-three million, one hundred sixty-eight thousand, one hundred twenty-five".