65561207 has 2 divisors, whose sum is σ = 65561208. Its totient is φ = 65561206.

The previous prime is 65561189. The next prime is 65561219. The reversal of 65561207 is 70216556.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65561207 - 2⁶ = 65561143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65561297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32780603 + 32780604.

It is an arithmetic number, because the mean of its divisors is an integer number (32780604).

Almost surely, 2^65561207 is an apocalyptic number.

65561207 is a deficient number, since it is larger than the sum of its proper divisors (1).

65561207 is an equidigital number, since it uses as much as digits as its factorization.

65561207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 65561207 is about 8096.9875262347. The cubic root of 65561207 is about 403.2264201444.

The spelling of 65561207 in words is "sixty-five million, five hundred sixty-one thousand, two hundred seven".