65760649 has 2 divisors, whose sum is σ = 65760650. Its totient is φ = 65760648.

The previous prime is 65760647. The next prime is 65760671. The reversal of 65760649 is 94606756.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62520649 + 3240000 = 7907^2 + 1800^2 .

It is a cyclic number.

It is not a de Polignac number, because 65760649 - 2¹ = 65760647 is a prime.

Together with 65760647, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (65760647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32880324 + 32880325.

It is an arithmetic number, because the mean of its divisors is an integer number (32880325).

Almost surely, 2^65760649 is an apocalyptic number.

It is an amenable number.

65760649 is a deficient number, since it is larger than the sum of its proper divisors (1).

65760649 is an equidigital number, since it uses as much as digits as its factorization.

65760649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 65760649 is about 8109.2939889981. The cubic root of 65760649 is about 403.6348876756.

The spelling of 65760649 in words is "sixty-five million, seven hundred sixty thousand, six hundred forty-nine".