6255625661 has 2 divisors, whose sum is σ = 6255625662. Its totient is φ = 6255625660.

The previous prime is 6255625603. The next prime is 6255625667. The reversal of 6255625661 is 1665265526.

6255625661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4325692900 + 1929932761 = 65770^2 + 43931^2 .

It is a cyclic number.

It is not a de Polignac number, because 6255625661 - 2¹⁰ = 6255624637 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6255625667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3127812830 + 3127812831.

It is an arithmetic number, because the mean of its divisors is an integer number (3127812831).

Almost surely, 2^6255625661 is an apocalyptic number.

It is an amenable number.

6255625661 is a deficient number, since it is larger than the sum of its proper divisors (1).

6255625661 is an equidigital number, since it uses as much as digits as its factorization.

6255625661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648000, while the sum is 44.

The square root of 6255625661 is about 79092.5133056220. The cubic root of 6255625661 is about 1842.5682532447.

The spelling of 6255625661 in words is "six billion, two hundred fifty-five million, six hundred twenty-five thousand, six hundred sixty-one".