7325215661 has 2 divisors, whose sum is σ = 7325215662. Its totient is φ = 7325215660.

The previous prime is 7325215633. The next prime is 7325215717. The reversal of 7325215661 is 1665125237.

It is a happy number.

7325215661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6274224100 + 1050991561 = 79210^2 + 32419^2 .

It is a cyclic number.

It is not a de Polignac number, because 7325215661 - 2²⁶ = 7258106797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7325215631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3662607830 + 3662607831.

It is an arithmetic number, because the mean of its divisors is an integer number (3662607831).

Almost surely, 2^7325215661 is an apocalyptic number.

It is an amenable number.

7325215661 is a deficient number, since it is larger than the sum of its proper divisors (1).

7325215661 is an equidigital number, since it uses as much as digits as its factorization.

7325215661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 38.

The square root of 7325215661 is about 85587.4737388597. The cubic root of 7325215661 is about 1942.1084227096.

The spelling of 7325215661 in words is "seven billion, three hundred twenty-five million, two hundred fifteen thousand, six hundred sixty-one".