208665065 has 8 divisors (see below), whose sum is σ = 286169280. Its totient is φ = 143084592.

The previous prime is 208665019. The next prime is 208665077. The reversal of 208665065 is 560566802.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 208665065 - 2¹⁶ = 208599529 is a prime.

It is a super-2 number, since 2×208665065² = 87082218702908450, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2980895 + ... + 2980964.

It is an arithmetic number, because the mean of its divisors is an integer number (35771160).

Almost surely, 2^208665065 is an apocalyptic number.

It is an amenable number.

208665065 is a deficient number, since it is larger than the sum of its proper divisors (77504215).

208665065 is an equidigital number, since it uses as much as digits as its factorization.

208665065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5961871.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 208665065 is about 14445.2436808799. The cubic root of 208665065 is about 593.1300329945.

The spelling of 208665065 in words is "two hundred eight million, six hundred sixty-five thousand, sixty-five".