667441408625 has 32 divisors (see below), whose sum is σ = 848938944672. Its totient is φ = 523720704000.

The previous prime is 667441408607. The next prime is 667441408633. The reversal of 667441408625 is 526804144766.

It can be written as a sum of positive squares in 16 ways, for example, as 380230090384 + 287211318241 = 616628^2 + 535921^2 .

It is not a de Polignac number, because 667441408625 - 2²⁰ = 667440360049 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25115345 + ... + 25141905.

It is an arithmetic number, because the mean of its divisors is an integer number (26529342021).

Almost surely, 2^667441408625 is an apocalyptic number.

It is an amenable number.

667441408625 is a deficient number, since it is larger than the sum of its proper divisors (181497536047).

667441408625 is a wasteful number, since it uses less digits than its factorization.

667441408625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30422 (or 30412 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 53.

The spelling of 667441408625 in words is "six hundred sixty-seven billion, four hundred forty-one million, four hundred eight thousand, six hundred twenty-five".