520166616655 has 16 divisors (see below), whose sum is σ = 719916056640. Its totient is φ = 353413331712.

The previous prime is 520166616617. The next prime is 520166616679. The reversal of 520166616655 is 556616661025.

It is not a de Polignac number, because 520166616655 - 2¹¹ = 520166614607 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 520166616599 and 520166616608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68170054 + ... + 68177683.

It is an arithmetic number, because the mean of its divisors is an integer number (44994753540).

Almost surely, 2^520166616655 is an apocalyptic number.

520166616655 is a deficient number, since it is larger than the sum of its proper divisors (199749439985).

520166616655 is a wasteful number, since it uses less digits than its factorization.

520166616655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136347858.

The product of its (nonzero) digits is 1944000, while the sum is 49.

The spelling of 520166616655 in words is "five hundred twenty billion, one hundred sixty-six million, six hundred sixteen thousand, six hundred fifty-five".