65685705 has 16 divisors (see below), whose sum is σ = 111279744. Its totient is φ = 32971520.

The previous prime is 65685691. The next prime is 65685707. The reversal of 65685705 is 50758656.

65685705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 65685705 - 2¹⁶ = 65620169 is a prime.

It is a super-2 number, since 2×65685705² = 8629223682694050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65685707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128541 + ... + 129050.

It is an arithmetic number, because the mean of its divisors is an integer number (6954984).

Almost surely, 2^65685705 is an apocalyptic number.

It is an amenable number.

65685705 is a deficient number, since it is larger than the sum of its proper divisors (45594039).

65685705 is a wasteful number, since it uses less digits than its factorization.

65685705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257616.

The product of its (nonzero) digits is 252000, while the sum is 42.

The square root of 65685705 is about 8104.6718008813. The cubic root of 65685705 is about 403.4814954761.

The spelling of 65685705 in words is "sixty-five million, six hundred eighty-five thousand, seven hundred five".