16660006605 has 72 divisors (see below), whose sum is σ = 32215668576. Its totient is φ = 7956843840.

The previous prime is 16660006541. The next prime is 16660006619. The reversal of 16660006605 is 50660006661.

It is not a de Polignac number, because 16660006605 - 2⁶ = 16660006541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16660006605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 341982 + ... + 387648.

Almost surely, 2^16660006605 is an apocalyptic number.

16660006605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16660006605 is a deficient number, since it is larger than the sum of its proper divisors (15555661971).

16660006605 is a wasteful number, since it uses less digits than its factorization.

16660006605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45767 (or 45753 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The spelling of 16660006605 in words is "sixteen billion, six hundred sixty million, six thousand, six hundred five".