660650006666 has 32 divisors (see below), whose sum is σ = 1130249090880. Its totient is φ = 286910989056.

The previous prime is 660650006617. The next prime is 660650006671. The reversal of 660650006666 is 666600056066.

It is a self number, because there is not a number n which added to its sum of digits gives 660650006666.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1707005 + ... + 2057951.

It is an arithmetic number, because the mean of its divisors is an integer number (35320284090).

Almost surely, 2^660650006666 is an apocalyptic number.

660650006666 is a deficient number, since it is larger than the sum of its proper divisors (469599084214).

660650006666 is a wasteful number, since it uses less digits than its factorization.

660650006666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355238.

The product of its (nonzero) digits is 1399680, while the sum is 47.

The spelling of 660650006666 in words is "six hundred sixty billion, six hundred fifty million, six thousand, six hundred sixty-six".