668768101 has 16 divisors (see below), whose sum is σ = 709228800. Its totient is φ = 629673408.

The previous prime is 668768077. The next prime is 668768129. The reversal of 668768101 is 101867866.

It is a cyclic number.

It is not a de Polignac number, because 668768101 - 2⁵ = 668768069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668768141) 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, 188395 + ... + 191911.

It is an arithmetic number, because the mean of its divisors is an integer number (44326800).

Almost surely, 2^668768101 is an apocalyptic number.

It is an amenable number.

668768101 is a deficient number, since it is larger than the sum of its proper divisors (40460699).

668768101 is a wasteful number, since it uses less digits than its factorization.

668768101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3708.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 668768101 is about 25860.5510575471. The cubic root of 668768101 is about 874.4973879739.

The spelling of 668768101 in words is "six hundred sixty-eight million, seven hundred sixty-eight thousand, one hundred one".