65163961 has 4 divisors (see below), whose sum is σ = 66056692. Its totient is φ = 64271232.

The previous prime is 65163947. The next prime is 65163983. The reversal of 65163961 is 16936156.

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

It can be written as a sum of positive squares in 2 ways, for example, as 55279225 + 9884736 = 7435^2 + 3144^2 .

It is a cyclic number.

It is not a de Polignac number, because 65163961 - 2⁵ = 65163929 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65163961.

It is not an unprimeable number, because it can be changed into a prime (65160961) 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, 446256 + ... + 446401.

It is an arithmetic number, because the mean of its divisors is an integer number (16514173).

Almost surely, 2^65163961 is an apocalyptic number.

It is an amenable number.

65163961 is a deficient number, since it is larger than the sum of its proper divisors (892731).

65163961 is an equidigital number, since it uses as much as digits as its factorization.

65163961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892730.

The product of its digits is 29160, while the sum is 37.

The square root of 65163961 is about 8072.4197735252. The cubic root of 65163961 is about 402.4103649275.

The spelling of 65163961 in words is "sixty-five million, one hundred sixty-three thousand, nine hundred sixty-one".