65633161 has 4 divisors (see below), whose sum is σ = 71599824. Its totient is φ = 59666500.

The previous prime is 65633147. The next prime is 65633213. The reversal of 65633161 is 16133656.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65633161 - 2⁹ = 65632649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65633261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2983315 + ... + 2983336.

It is an arithmetic number, because the mean of its divisors is an integer number (17899956).

Almost surely, 2^65633161 is an apocalyptic number.

It is an amenable number.

65633161 is a deficient number, since it is larger than the sum of its proper divisors (5966663).

65633161 is a wasteful number, since it uses less digits than its factorization.

65633161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5966662.

The product of its digits is 9720, while the sum is 31.

The square root of 65633161 is about 8101.4295652064. The cubic root of 65633161 is about 403.3738810559.

The spelling of 65633161 in words is "sixty-five million, six hundred thirty-three thousand, one hundred sixty-one".