669170944625 has 8 divisors (see below), whose sum is σ = 835125339048. Its totient is φ = 535336755600.

The previous prime is 669170944621. The next prime is 669170944633. The reversal of 669170944625 is 526449071966.

It can be written as a sum of positive squares in 4 ways, for example, as 6677504656 + 662493439969 = 81716^2 + 813937^2 .

It is not a de Polignac number, because 669170944625 - 2² = 669170944621 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669170944621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2676683654 + ... + 2676683903.

It is an arithmetic number, because the mean of its divisors is an integer number (104390667381).

Almost surely, 2^669170944625 is an apocalyptic number.

It is an amenable number.

669170944625 is a deficient number, since it is larger than the sum of its proper divisors (165954394423).

669170944625 is an equidigital number, since it uses as much as digits as its factorization.

669170944625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5353367572 (or 5353367562 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 59.

The spelling of 669170944625 in words is "six hundred sixty-nine billion, one hundred seventy million, nine hundred forty-four thousand, six hundred twenty-five".