668246261125 has 8 divisors (see below), whose sum is σ = 833971334040. Its totient is φ = 534597008800.

The previous prime is 668246261101. The next prime is 668246261143. The reversal of 668246261125 is 521162642866.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 162648470209 + 505597790916 = 403297^2 + 711054^2 .

It is not a de Polignac number, because 668246261125 - 2¹¹ = 668246259077 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2672984920 + ... + 2672985169.

It is an arithmetic number, because the mean of its divisors is an integer number (104246416755).

Almost surely, 2^668246261125 is an apocalyptic number.

It is an amenable number.

668246261125 is a deficient number, since it is larger than the sum of its proper divisors (165725072915).

668246261125 is an equidigital number, since it uses as much as digits as its factorization.

668246261125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5345970104 (or 5345970094 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 49.

The spelling of 668246261125 in words is "six hundred sixty-eight billion, two hundred forty-six million, two hundred sixty-one thousand, one hundred twenty-five".