65687161 has 8 divisors (see below), whose sum is σ = 69250880. Its totient is φ = 62134128.

The previous prime is 65687137. The next prime is 65687177. The reversal of 65687161 is 16178656.

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 65687161 - 2⁵ = 65687129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65687191) 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, 12100 + ... + 16666.

It is an arithmetic number, because the mean of its divisors is an integer number (8656360).

Almost surely, 2^65687161 is an apocalyptic number.

It is an amenable number.

65687161 is a deficient number, since it is larger than the sum of its proper divisors (3563719).

65687161 is a wasteful number, since it uses less digits than its factorization.

65687161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5343.

The product of its digits is 60480, while the sum is 40.

The square root of 65687161 is about 8104.7616251189. The cubic root of 65687161 is about 403.4844766662.

The spelling of 65687161 in words is "sixty-five million, six hundred eighty-seven thousand, one hundred sixty-one".