5065659815661 has 6 divisors (see below), whose sum is σ = 7317064178190. Its totient is φ = 3377106543768.

The previous prime is 5065659815651. The next prime is 5065659815791. The reversal of 5065659815661 is 1665189565605.

It is a happy number.

5065659815661 is a `hidden beast` number, since 5 + 0 + 6 + 5 + 65 + 9 + 8 + 1 + 566 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3227753594025 + 1837906221636 = 1796595^2 + 1355694^2 .

It is not a de Polignac number, because 5065659815661 - 2¹⁰ = 5065659814637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5065659815621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 281425545306 + ... + 281425545323.

It is an arithmetic number, because the mean of its divisors is an integer number (1219510696365).

Almost surely, 2^{5065659815661} is an apocalyptic number.

It is an amenable number.

5065659815661 is a deficient number, since it is larger than the sum of its proper divisors (2251404362529).

5065659815661 is a wasteful number, since it uses less digits than its factorization.

5065659815661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562851090635 (or 562851090632 counting only the distinct ones).

The product of its (nonzero) digits is 58320000, while the sum is 63.

The spelling of 5065659815661 in words is "five trillion, sixty-five billion, six hundred fifty-nine million, eight hundred fifteen thousand, six hundred sixty-one".