668160125 has 8 divisors (see below), whose sum is σ = 833863992. Its totient is φ = 534528000.

The previous prime is 668160121. The next prime is 668160169. The reversal of 668160125 is 521061866.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18267076 + 649893049 = 4274^2 + 25493^2 .

It is not a de Polignac number, because 668160125 - 2² = 668160121 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668160121) 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 7 ways as a sum of consecutive naturals, for example, 2672516 + ... + 2672765.

It is an arithmetic number, because the mean of its divisors is an integer number (104232999).

Almost surely, 2^668160125 is an apocalyptic number.

It is an amenable number.

668160125 is a deficient number, since it is larger than the sum of its proper divisors (165703867).

668160125 is an equidigital number, since it uses as much as digits as its factorization.

668160125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5345296 (or 5345286 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 668160125 is about 25848.7934921536. The cubic root of 668160125 is about 874.2323062417.

The spelling of 668160125 in words is "six hundred sixty-eight million, one hundred sixty thousand, one hundred twenty-five".