650065665 has 32 divisors (see below), whose sum is σ = 1050414336. Its totient is φ = 343284480.

The previous prime is 650065643. The next prime is 650065673. The reversal of 650065665 is 566560056.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-650065665 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1029900 + ... + 1030530.

It is an arithmetic number, because the mean of its divisors is an integer number (32825448).

Almost surely, 2^650065665 is an apocalyptic number.

It is an amenable number.

650065665 is a deficient number, since it is larger than the sum of its proper divisors (400348671).

650065665 is a wasteful number, since it uses less digits than its factorization.

650065665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209.

The product of its (nonzero) digits is 162000, while the sum is 39.

The square root of 650065665 is about 25496.3853320427. The cubic root of 650065665 is about 866.2682744053.

The spelling of 650065665 in words is "six hundred fifty million, sixty-five thousand, six hundred sixty-five".