65987699 has 2 divisors, whose sum is σ = 65987700. Its totient is φ = 65987698.

The previous prime is 65987683. The next prime is 65987723. The reversal of 65987699 is 99678956.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65987699 - 2⁴ = 65987683 is a prime.

It is not a weakly prime, because it can be changed into another prime (65987629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32993849 + 32993850.

It is an arithmetic number, because the mean of its divisors is an integer number (32993850).

Almost surely, 2^65987699 is an apocalyptic number.

65987699 is a deficient number, since it is larger than the sum of its proper divisors (1).

65987699 is an equidigital number, since it uses as much as digits as its factorization.

65987699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7348320, while the sum is 59.

The square root of 65987699 is about 8123.2812951418. The cubic root of 65987699 is about 404.0988937884.

The spelling of 65987699 in words is "sixty-five million, nine hundred eighty-seven thousand, six hundred ninety-nine".