660006506 has 8 divisors (see below), whose sum is σ = 990139584. Its totient is φ = 329959980.

The previous prime is 660006497. The next prime is 660006533. The reversal of 660006506 is 605600066.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 3071 + ... + 36461.

It is an arithmetic number, because the mean of its divisors is an integer number (123767448).

Almost surely, 2^660006506 is an apocalyptic number.

660006506 is a deficient number, since it is larger than the sum of its proper divisors (330133078).

660006506 is a wasteful number, since it uses less digits than its factorization.

660006506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43276.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 660006506 is about 25690.5917798715. The cubic root of 660006506 is about 870.6616299696.

The spelling of 660006506 in words is "six hundred sixty million, six thousand, five hundred six".