65506161 has 8 divisors (see below), whose sum is σ = 99818944. Its totient is φ = 37432080.

The previous prime is 65506159. The next prime is 65506163. The reversal of 65506161 is 16160556.

It is an interprime number because it is at equal distance from previous prime (65506159) and next prime (65506163).

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

It is not a de Polignac number, because 65506161 - 2¹ = 65506159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65506163) 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, 1559650 + ... + 1559691.

It is an arithmetic number, because the mean of its divisors is an integer number (12477368).

Almost surely, 2^65506161 is an apocalyptic number.

It is an amenable number.

65506161 is a deficient number, since it is larger than the sum of its proper divisors (34312783).

65506161 is a wasteful number, since it uses less digits than its factorization.

65506161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3119351.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 65506161 is about 8093.5876470203. The cubic root of 65506161 is about 403.1135372499.

The spelling of 65506161 in words is "sixty-five million, five hundred six thousand, one hundred sixty-one".