65725999 has 2 divisors, whose sum is σ = 65726000. Its totient is φ = 65725998.

The previous prime is 65725991. The next prime is 65726021. The reversal of 65725999 is 99952756.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65725999 - 2³ = 65725991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65725991) 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, 32862999 + 32863000.

It is an arithmetic number, because the mean of its divisors is an integer number (32863000).

Almost surely, 2^65725999 is an apocalyptic number.

65725999 is a deficient number, since it is larger than the sum of its proper divisors (1).

65725999 is an equidigital number, since it uses as much as digits as its factorization.

65725999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1530900, while the sum is 52.

The square root of 65725999 is about 8107.1572699683. The cubic root of 65725999 is about 403.5639820188.

The spelling of 65725999 in words is "sixty-five million, seven hundred twenty-five thousand, nine hundred ninety-nine".