1660006667 has 16 divisors (see below), whose sum is σ = 1935384192. Its totient is φ = 1407035520.

The previous prime is 1660006651. The next prime is 1660006709. The reversal of 1660006667 is 7666000661.

It is a happy number.

It is not a de Polignac number, because 1660006667 - 2⁴ = 1660006651 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1660006667.

It is not an unprimeable number, because it can be changed into a prime (1660006067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21473 + ... + 61490.

It is an arithmetic number, because the mean of its divisors is an integer number (120961512).

Almost surely, 2^1660006667 is an apocalyptic number.

1660006667 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1660006667 is a deficient number, since it is larger than the sum of its proper divisors (275377525).

1660006667 is a wasteful number, since it uses less digits than its factorization.

1660006667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83098.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 1660006667 is about 40743.1793923842. The cubic root of 1660006667 is about 1184.0497326912.

The spelling of 1660006667 in words is "one billion, six hundred sixty million, six thousand, six hundred sixty-seven".