5126662661 has 2 divisors, whose sum is σ = 5126662662. Its totient is φ = 5126662660.

The previous prime is 5126662657. The next prime is 5126662703. The reversal of 5126662661 is 1662666215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4381645636 + 745017025 = 66194^2 + 27295^2 .

It is a cyclic number.

It is not a de Polignac number, because 5126662661 - 2² = 5126662657 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5126662561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2563331330 + 2563331331.

It is an arithmetic number, because the mean of its divisors is an integer number (2563331331).

Almost surely, 2^5126662661 is an apocalyptic number.

It is an amenable number.

5126662661 is a deficient number, since it is larger than the sum of its proper divisors (1).

5126662661 is an equidigital number, since it uses as much as digits as its factorization.

5126662661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 41.

The square root of 5126662661 is about 71600.7169028355. The cubic root of 5126662661 is about 1724.2950460920.

The spelling of 5126662661 in words is "five billion, one hundred twenty-six million, six hundred sixty-two thousand, six hundred sixty-one".