65617801 has 2 divisors, whose sum is σ = 65617802. Its totient is φ = 65617800.

The previous prime is 65617789. The next prime is 65617819. The reversal of 65617801 is 10871656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49336576 + 16281225 = 7024^2 + 4035^2 .

It is a cyclic number.

It is not a de Polignac number, because 65617801 - 2¹⁹ = 65093513 is a prime.

It is not a weakly prime, because it can be changed into another prime (65617861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32808900 + 32808901.

It is an arithmetic number, because the mean of its divisors is an integer number (32808901).

Almost surely, 2^65617801 is an apocalyptic number.

It is an amenable number.

65617801 is a deficient number, since it is larger than the sum of its proper divisors (1).

65617801 is an equidigital number, since it uses as much as digits as its factorization.

65617801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 65617801 is about 8100.4815288969. The cubic root of 65617801 is about 403.3424116680.

The spelling of 65617801 in words is "sixty-five million, six hundred seventeen thousand, eight hundred one".