516660006601 has 4 divisors (see below), whose sum is σ = 523737541012. Its totient is φ = 509582472192.

The previous prime is 516660006523. The next prime is 516660006677. The reversal of 516660006601 is 106600066615.

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 383563455625 + 133096550976 = 619325^2 + 364824^2 .

It is a cyclic number.

It is not a de Polignac number, because 516660006601 - 2²⁵ = 516626452169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (516660006691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3538767096 + ... + 3538767241.

It is an arithmetic number, because the mean of its divisors is an integer number (130934385253).

Almost surely, 2^516660006601 is an apocalyptic number.

It is an amenable number.

516660006601 is a deficient number, since it is larger than the sum of its proper divisors (7077534411).

516660006601 is an equidigital number, since it uses as much as digits as its factorization.

516660006601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7077534410.

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 516660006601 in words is "five hundred sixteen billion, six hundred sixty million, six thousand, six hundred one".