65686861 has 8 divisors (see below), whose sum is σ = 71794944. Its totient is φ = 59828160.

The previous prime is 65686853. The next prime is 65686897. The reversal of 65686861 is 16868656.

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 65686861 - 2³ = 65686853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65686261) 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, 61795 + ... + 62848.

It is an arithmetic number, because the mean of its divisors is an integer number (8974368).

Almost surely, 2^65686861 is an apocalyptic number.

It is an amenable number.

65686861 is a deficient number, since it is larger than the sum of its proper divisors (6108083).

65686861 is a wasteful number, since it uses less digits than its factorization.

65686861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124691.

The product of its digits is 414720, while the sum is 46.

The square root of 65686861 is about 8104.7431174591. The cubic root of 65686861 is about 403.4838624136.

The spelling of 65686861 in words is "sixty-five million, six hundred eighty-six thousand, eight hundred sixty-one".