5165110661 has 2 divisors, whose sum is σ = 5165110662. Its totient is φ = 5165110660.

The previous prime is 5165110631. The next prime is 5165110729. The reversal of 5165110661 is 1660115615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5158830625 + 6280036 = 71825^2 + 2506^2 .

It is a cyclic number.

It is not a de Polignac number, because 5165110661 - 2¹⁰ = 5165109637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5165110631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2582555330 + 2582555331.

It is an arithmetic number, because the mean of its divisors is an integer number (2582555331).

Almost surely, 2^5165110661 is an apocalyptic number.

It is an amenable number.

5165110661 is a deficient number, since it is larger than the sum of its proper divisors (1).

5165110661 is an equidigital number, since it uses as much as digits as its factorization.

5165110661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 5165110661 is about 71868.7043225353. The cubic root of 5165110661 is about 1728.5948317831.

The spelling of 5165110661 in words is "five billion, one hundred sixty-five million, one hundred ten thousand, six hundred sixty-one".