668870011 has 16 divisors (see below), whose sum is σ = 688537600. Its totient is φ = 649591488.

The previous prime is 668870009. The next prime is 668870029. The reversal of 668870011 is 110078866.

It is a cyclic number.

It is not a de Polignac number, because 668870011 - 2¹ = 668870009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668870611) 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 15 ways as a sum of consecutive naturals, for example, 1635175 + ... + 1635583.

It is an arithmetic number, because the mean of its divisors is an integer number (43033600).

Almost surely, 2^668870011 is an apocalyptic number.

668870011 is a deficient number, since it is larger than the sum of its proper divisors (19667589).

668870011 is a wasteful number, since it uses less digits than its factorization.

668870011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 668870011 is about 25862.5213581352. The cubic root of 668870011 is about 874.5418057136.

The spelling of 668870011 in words is "six hundred sixty-eight million, eight hundred seventy thousand, eleven".