65500649 has 2 divisors, whose sum is σ = 65500650. Its totient is φ = 65500648.

The previous prime is 65500639. The next prime is 65500661. The reversal of 65500649 is 94600556.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34140649 + 31360000 = 5843^2 + 5600^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65500649 is a prime.

It is not a weakly prime, because it can be changed into another prime (65500639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32750324 + 32750325.

It is an arithmetic number, because the mean of its divisors is an integer number (32750325).

Almost surely, 2^65500649 is an apocalyptic number.

It is an amenable number.

65500649 is a deficient number, since it is larger than the sum of its proper divisors (1).

65500649 is an equidigital number, since it uses as much as digits as its factorization.

65500649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 65500649 is about 8093.2471233739. The cubic root of 65500649 is about 403.1022303026.

The spelling of 65500649 in words is "sixty-five million, five hundred thousand, six hundred forty-nine".