1325666305 has 8 divisors (see below), whose sum is σ = 1594476072. Its totient is φ = 1058082048.

The previous prime is 1325666291. The next prime is 1325666429. The reversal of 1325666305 is 5036665231.

It can be written as a sum of positive squares in 4 ways, for example, as 198922816 + 1126743489 = 14104^2 + 33567^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1325666305 - 2⁹ = 1325665793 is a prime.

It is a Duffinian 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, 303994 + ... + 308323.

It is an arithmetic number, because the mean of its divisors is an integer number (199309509).

Almost surely, 2^1325666305 is an apocalyptic number.

It is an amenable number.

1325666305 is a deficient number, since it is larger than the sum of its proper divisors (268809767).

1325666305 is an equidigital number, since it uses as much as digits as its factorization.

1325666305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612755.

The product of its (nonzero) digits is 97200, while the sum is 37.

The square root of 1325666305 is about 36409.7006991269. The cubic root of 1325666305 is about 1098.5286954691.

The spelling of 1325666305 in words is "one billion, three hundred twenty-five million, six hundred sixty-six thousand, three hundred five".