668411776 has 32 divisors (see below), whose sum is σ = 1339086600. Its totient is φ = 332327424.

The previous prime is 668411743. The next prime is 668411791. The reversal of 668411776 is 677114866.

668411776 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8326 + ... + 37498.

Almost surely, 2^668411776 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 668411776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (669543300).

668411776 is an abundant number, since it is smaller than the sum of its proper divisors (670674824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

668411776 is a wasteful number, since it uses less digits than its factorization.

668411776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29366 (or 29354 counting only the distinct ones).

The product of its digits is 338688, while the sum is 46.

The square root of 668411776 is about 25853.6607852737. The cubic root of 668411776 is about 874.3420473111.

The spelling of 668411776 in words is "six hundred sixty-eight million, four hundred eleven thousand, seven hundred seventy-six".