627928661 has 2 divisors, whose sum is σ = 627928662. Its totient is φ = 627928660.

The previous prime is 627928603. The next prime is 627928703. The reversal of 627928661 is 166829726.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 555780625 + 72148036 = 23575^2 + 8494^2 .

It is a cyclic number.

It is not a de Polignac number, because 627928661 - 2⁶ = 627928597 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (627922661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313964330 + 313964331.

It is an arithmetic number, because the mean of its divisors is an integer number (313964331).

Almost surely, 2^627928661 is an apocalyptic number.

It is an amenable number.

627928661 is a deficient number, since it is larger than the sum of its proper divisors (1).

627928661 is an equidigital number, since it uses as much as digits as its factorization.

627928661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 47.

The square root of 627928661 is about 25058.5047638521. The cubic root of 627928661 is about 856.3213434720.

The spelling of 627928661 in words is "six hundred twenty-seven million, nine hundred twenty-eight thousand, six hundred sixty-one".