65666105 has 8 divisors (see below), whose sum is σ = 79564992. Its totient is φ = 52022448.

The previous prime is 65666101. The next prime is 65666113. The reversal of 65666105 is 50166656.

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 65666105 - 2² = 65666101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65666101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63239 + ... + 64268.

It is an arithmetic number, because the mean of its divisors is an integer number (9945624).

Almost surely, 2^65666105 is an apocalyptic number.

It is an amenable number.

65666105 is a deficient number, since it is larger than the sum of its proper divisors (13898887).

65666105 is a wasteful number, since it uses less digits than its factorization.

65666105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127615.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 65666105 is about 8103.4625315355. The cubic root of 65666105 is about 403.4413597824.

The spelling of 65666105 in words is "sixty-five million, six hundred sixty-six thousand, one hundred five".