257066274797 has 2 divisors, whose sum is σ = 257066274798. Its totient is φ = 257066274796.

The previous prime is 257066274791. The next prime is 257066274821. The reversal of 257066274797 is 797472660752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 257060154121 + 6120676 = 507011^2 + 2474^2 .

It is a cyclic number.

It is not a de Polignac number, because 257066274797 - 2⁶ = 257066274733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257066274791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128533137398 + 128533137399.

It is an arithmetic number, because the mean of its divisors is an integer number (128533137399).

Almost surely, 2^257066274797 is an apocalyptic number.

It is an amenable number.

257066274797 is a deficient number, since it is larger than the sum of its proper divisors (1).

257066274797 is an equidigital number, since it uses as much as digits as its factorization.

257066274797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62233920, while the sum is 62.

The spelling of 257066274797 in words is "two hundred fifty-seven billion, sixty-six million, two hundred seventy-four thousand, seven hundred ninety-seven".