65166111864209 has 8 divisors (see below), whose sum is σ = 65346427435968. Its totient is φ = 64986023249680.

The previous prime is 65166111864199. The next prime is 65166111864253. The reversal of 65166111864209 is 90246811166156.

It is a happy number.

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 65166111864209 - 2²⁴ = 65166095086993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65166111864809) 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, 56164247 + ... + 57312780.

It is an arithmetic number, because the mean of its divisors is an integer number (8168303429496).

Almost surely, 2^{65166111864209} is an apocalyptic number.

It is an amenable number.

65166111864209 is a deficient number, since it is larger than the sum of its proper divisors (180315571759).

65166111864209 is a wasteful number, since it uses less digits than its factorization.

65166111864209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113478615.

The product of its (nonzero) digits is 3732480, while the sum is 56.

The spelling of 65166111864209 in words is "sixty-five trillion, one hundred sixty-six billion, one hundred eleven million, eight hundred sixty-four thousand, two hundred nine".