65704649 has 2 divisors, whose sum is σ = 65704650. Its totient is φ = 65704648.

The previous prime is 65704631. The next prime is 65704651. The reversal of 65704649 is 94640756.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42250000 + 23454649 = 6500^2 + 4843^2 .

It is a cyclic number.

It is not a de Polignac number, because 65704649 - 2²⁰ = 64656073 is a prime.

Together with 65704651, 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 (65704619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32852324 + 32852325.

It is an arithmetic number, because the mean of its divisors is an integer number (32852325).

Almost surely, 2^65704649 is an apocalyptic number.

It is an amenable number.

65704649 is a deficient number, since it is larger than the sum of its proper divisors (1).

65704649 is an equidigital number, since it uses as much as digits as its factorization.

65704649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 65704649 is about 8105.8404252736. The cubic root of 65704649 is about 403.5202802658.

The spelling of 65704649 in words is "sixty-five million, seven hundred four thousand, six hundred forty-nine".