65625257 has 2 divisors, whose sum is σ = 65625258. Its totient is φ = 65625256.

The previous prime is 65625251. The next prime is 65625269. The reversal of 65625257 is 75252656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33860761 + 31764496 = 5819^2 + 5636^2 .

It is a cyclic number.

It is not a de Polignac number, because 65625257 - 2⁶ = 65625193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65625257.

It is not a weakly prime, because it can be changed into another prime (65625251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32812628 + 32812629.

It is an arithmetic number, because the mean of its divisors is an integer number (32812629).

Almost surely, 2^65625257 is an apocalyptic number.

It is an amenable number.

65625257 is a deficient number, since it is larger than the sum of its proper divisors (1).

65625257 is an equidigital number, since it uses as much as digits as its factorization.

65625257 is an odious number, because the sum of its binary digits is odd.

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

The square root of 65625257 is about 8100.9417353787. The cubic root of 65625257 is about 403.3576880466.

The spelling of 65625257 in words is "sixty-five million, six hundred twenty-five thousand, two hundred fifty-seven".