5001060051661 has 4 divisors (see below), whose sum is σ = 5173510398300. Its totient is φ = 4828609705024.

The previous prime is 5001060051653. The next prime is 5001060051679. The reversal of 5001060051661 is 1661500601005.

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 1086637371561 + 3914422680100 = 1042419^2 + 1978490^2 .

It is a cyclic number.

It is not a de Polignac number, because 5001060051661 - 2³ = 5001060051653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5001060051601) 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, 86225173276 + ... + 86225173333.

It is an arithmetic number, because the mean of its divisors is an integer number (1293377599575).

Almost surely, 2^{5001060051661} is an apocalyptic number.

It is an amenable number.

5001060051661 is a deficient number, since it is larger than the sum of its proper divisors (172450346639).

5001060051661 is a wasteful number, since it uses less digits than its factorization.

5001060051661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172450346638.

The product of its (nonzero) digits is 5400, while the sum is 31.

Adding to 5001060051661 its reverse (1661500601005), we get a palindrome (6662560652666).

The spelling of 5001060051661 in words is "five trillion, one billion, sixty million, fifty-one thousand, six hundred sixty-one".