5206620345665 has 16 divisors (see below), whose sum is σ = 6280134768000. Its totient is φ = 4143841333632.

The previous prime is 5206620345643. The next prime is 5206620345683. The reversal of 5206620345665 is 5665430266025.

It is a cyclic number.

It is not a de Polignac number, because 5206620345665 - 2¹⁰ = 5206620344641 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7642274 + ... + 8295636.

It is an arithmetic number, because the mean of its divisors is an integer number (392508423000).

Almost surely, 2^{5206620345665} is an apocalyptic number.

It is an amenable number.

5206620345665 is a deficient number, since it is larger than the sum of its proper divisors (1073514422335).

5206620345665 is a wasteful number, since it uses less digits than its factorization.

5206620345665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661576.

The product of its (nonzero) digits is 7776000, while the sum is 50.

The spelling of 5206620345665 in words is "five trillion, two hundred six billion, six hundred twenty million, three hundred forty-five thousand, six hundred sixty-five".