65660061005665 has 32 divisors (see below), whose sum is σ = 95361470740224. Its totient is φ = 42368261683200.

The previous prime is 65660061005639. The next prime is 65660061005731. The reversal of 65660061005665 is 56650016006656.

It is not a de Polignac number, because 65660061005665 - 2⁷ = 65660061005537 is a prime.

It is a super-2 number, since 2×65660061005665² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

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, 6059959 + ... + 12963148.

It is an arithmetic number, because the mean of its divisors is an integer number (2980045960632).

Almost surely, 2^{65660061005665} is an apocalyptic number.

It is an amenable number.

65660061005665 is a deficient number, since it is larger than the sum of its proper divisors (29701409734559).

65660061005665 is a wasteful number, since it uses less digits than its factorization.

65660061005665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19028937.

The product of its (nonzero) digits is 5832000, while the sum is 52.

The spelling of 65660061005665 in words is "sixty-five trillion, six hundred sixty billion, sixty-one million, five thousand, six hundred sixty-five".