65665049 has 8 divisors (see below), whose sum is σ = 66536640. Its totient is φ = 64798000.

The previous prime is 65665043. The next prime is 65665057. The reversal of 65665049 is 94056656.

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

It is a cyclic number.

It is not a de Polignac number, because 65665049 - 2²⁴ = 48887833 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 65664997 and 65665015.

It is not an unprimeable number, because it can be changed into a prime (65665043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35354 + ... + 37164.

It is an arithmetic number, because the mean of its divisors is an integer number (8317080).

Almost surely, 2^65665049 is an apocalyptic number.

It is an amenable number.

65665049 is a deficient number, since it is larger than the sum of its proper divisors (871591).

65665049 is a wasteful number, since it uses less digits than its factorization.

65665049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2271.

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 65665049 is about 8103.3973739414. The cubic root of 65665049 is about 403.4391971428.

The spelling of 65665049 in words is "sixty-five million, six hundred sixty-five thousand, forty-nine".