65924561 has 2 divisors, whose sum is σ = 65924562. Its totient is φ = 65924560.

The previous prime is 65924549. The next prime is 65924563. The reversal of 65924561 is 16542956.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65918161 + 6400 = 8119^2 + 80^2 .

It is a cyclic number.

It is not a de Polignac number, because 65924561 - 2⁶ = 65924497 is a prime.

Together with 65924563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65924563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32962280 + 32962281.

It is an arithmetic number, because the mean of its divisors is an integer number (32962281).

Almost surely, 2^65924561 is an apocalyptic number.

It is an amenable number.

65924561 is a deficient number, since it is larger than the sum of its proper divisors (1).

65924561 is an equidigital number, since it uses as much as digits as its factorization.

65924561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 38.

The square root of 65924561 is about 8119.3941276428. The cubic root of 65924561 is about 403.9699700745.

The spelling of 65924561 in words is "sixty-five million, nine hundred twenty-four thousand, five hundred sixty-one".