665136065 has 8 divisors (see below), whose sum is σ = 870723648. Its totient is φ = 483735280.

The previous prime is 665136037. The next prime is 665136091. The reversal of 665136065 is 560631566.

665136065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 665136065 - 2¹² = 665131969 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6046637 + ... + 6046746.

It is an arithmetic number, because the mean of its divisors is an integer number (108840456).

Almost surely, 2^665136065 is an apocalyptic number.

It is an amenable number.

665136065 is a deficient number, since it is larger than the sum of its proper divisors (205587583).

665136065 is a wasteful number, since it uses less digits than its factorization.

665136065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12093399.

The product of its (nonzero) digits is 97200, while the sum is 38.

The square root of 665136065 is about 25790.2319687125. The cubic root of 665136065 is about 872.9114005818.

The spelling of 665136065 in words is "six hundred sixty-five million, one hundred thirty-six thousand, sixty-five".