65665065 has 8 divisors (see below), whose sum is σ = 105064128. Its totient is φ = 35021360.

The previous prime is 65665057. The next prime is 65665081. The reversal of 65665065 is 56056656.

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 65665065 - 2³ = 65665057 is a prime.

It is a super-2 number, since 2×65665065² = 8623801522908450, which contains 22 as substring.

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, 2188821 + ... + 2188850.

It is an arithmetic number, because the mean of its divisors is an integer number (13133016).

Almost surely, 2^65665065 is an apocalyptic number.

It is an amenable number.

65665065 is a deficient number, since it is larger than the sum of its proper divisors (39399063).

65665065 is a wasteful number, since it uses less digits than its factorization.

65665065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4377679.

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

The square root of 65665065 is about 8103.3983611816. The cubic root of 65665065 is about 403.4392299102.

The spelling of 65665065 in words is "sixty-five million, six hundred sixty-five thousand, sixty-five".