65161339 has 4 divisors (see below), whose sum is σ = 65431960. Its totient is φ = 64890720.

The previous prime is 65161331. The next prime is 65161351. The reversal of 65161339 is 93316156.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65161339 - 2³ = 65161331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65161331) 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, 134949 + ... + 135430.

It is an arithmetic number, because the mean of its divisors is an integer number (16357990).

Almost surely, 2^65161339 is an apocalyptic number.

65161339 is a deficient number, since it is larger than the sum of its proper divisors (270621).

65161339 is a wasteful number, since it uses less digits than its factorization.

65161339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270620.

The product of its digits is 14580, while the sum is 34.

The square root of 65161339 is about 8072.2573670566. The cubic root of 65161339 is about 402.4049675979.

The spelling of 65161339 in words is "sixty-five million, one hundred sixty-one thousand, three hundred thirty-nine".