2660550257 has 2 divisors, whose sum is σ = 2660550258. Its totient is φ = 2660550256.

The previous prime is 2660550209. The next prime is 2660550271. The reversal of 2660550257 is 7520550662.

2660550257 is digitally balanced in base 2, 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., 2250933136 + 409617121 = 47444^2 + 20239^2 .

It is a cyclic number.

It is not a de Polignac number, because 2660550257 - 2¹⁴ = 2660533873 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2660550257.

It is not a weakly prime, because it can be changed into another prime (2660550457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330275128 + 1330275129.

It is an arithmetic number, because the mean of its divisors is an integer number (1330275129).

Almost surely, 2^2660550257 is an apocalyptic number.

It is an amenable number.

2660550257 is a deficient number, since it is larger than the sum of its proper divisors (1).

2660550257 is an equidigital number, since it uses as much as digits as its factorization.

2660550257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126000, while the sum is 38.

The square root of 2660550257 is about 51580.5220698666. The cubic root of 2660550257 is about 1385.6615166738.

The spelling of 2660550257 in words is "two billion, six hundred sixty million, five hundred fifty thousand, two hundred fifty-seven".