65516129 has 4 divisors (see below), whose sum is σ = 74875584. Its totient is φ = 56156676.

The previous prime is 65516117. The next prime is 65516141. The reversal of 65516129 is 92161556.

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 an interprime number because it is at equal distance from previous prime (65516117) and next prime (65516141).

It is a cyclic number.

It is not a de Polignac number, because 65516129 - 2⁸ = 65515873 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65516149) 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, 4679717 + ... + 4679730.

It is an arithmetic number, because the mean of its divisors is an integer number (18718896).

Almost surely, 2^65516129 is an apocalyptic number.

It is an amenable number.

65516129 is a deficient number, since it is larger than the sum of its proper divisors (9359455).

65516129 is an equidigital number, since it uses as much as digits as its factorization.

65516129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9359454.

The product of its digits is 16200, while the sum is 35.

The square root of 65516129 is about 8094.2034197319. The cubic root of 65516129 is about 403.1339833264.

The spelling of 65516129 in words is "sixty-five million, five hundred sixteen thousand, one hundred twenty-nine".