5017051661 has 2 divisors, whose sum is σ = 5017051662. Its totient is φ = 5017051660.

The previous prime is 5017051643. The next prime is 5017051681. The reversal of 5017051661 is 1661507105.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4994107561 + 22944100 = 70669^2 + 4790^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5017051661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5017051681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2508525830 + 2508525831.

It is an arithmetic number, because the mean of its divisors is an integer number (2508525831).

Almost surely, 2^5017051661 is an apocalyptic number.

It is an amenable number.

5017051661 is a deficient number, since it is larger than the sum of its proper divisors (1).

5017051661 is an equidigital number, since it uses as much as digits as its factorization.

5017051661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6300, while the sum is 32.

The square root of 5017051661 is about 70831.1489459263. The cubic root of 5017051661 is about 1711.9176031262.

Adding to 5017051661 its reverse (1661507105), we get a palindrome (6678558766).

The spelling of 5017051661 in words is "five billion, seventeen million, fifty-one thousand, six hundred sixty-one".