65961161 has 8 divisors (see below), whose sum is σ = 75433344. Its totient is φ = 56501280.

The previous prime is 65961143. The next prime is 65961187. The reversal of 65961161 is 16116956.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65961161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65961101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19076 + ... + 22266.

It is an arithmetic number, because the mean of its divisors is an integer number (9429168).

Almost surely, 2^65961161 is an apocalyptic number.

It is an amenable number.

65961161 is a deficient number, since it is larger than the sum of its proper divisors (9472183).

65961161 is a wasteful number, since it uses less digits than its factorization.

65961161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6151.

The product of its digits is 9720, while the sum is 35.

The square root of 65961161 is about 8121.6476776575. The cubic root of 65961161 is about 404.0447149311.

The spelling of 65961161 in words is "sixty-five million, nine hundred sixty-one thousand, one hundred sixty-one".