1669320325 has 6 divisors (see below), whose sum is σ = 2069957234. Its totient is φ = 1335456240.

The previous prime is 1669320313. The next prime is 1669320337. The reversal of 1669320325 is 5230239661.

It is an interprime number because it is at equal distance from previous prime (1669320313) and next prime (1669320337).

It can be written as a sum of positive squares in 3 ways, for example, as 351412516 + 1317907809 = 18746^2 + 36303^2 .

It is not a de Polignac number, because 1669320325 - 2¹⁹ = 1668796037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33386382 + ... + 33386431.

Almost surely, 2^1669320325 is an apocalyptic number.

It is an amenable number.

1669320325 is a deficient number, since it is larger than the sum of its proper divisors (400636909).

1669320325 is an equidigital number, since it uses as much as digits as its factorization.

1669320325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66772823 (or 66772818 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 37.

The square root of 1669320325 is about 40857.3166642157. The cubic root of 1669320325 is about 1186.2600197984.

Adding to 1669320325 its reverse (5230239661), we get a palindrome (6899559986).

The spelling of 1669320325 in words is "one billion, six hundred sixty-nine million, three hundred twenty thousand, three hundred twenty-five".