668667488 has 12 divisors (see below), whose sum is σ = 1316439180. Its totient is φ = 334333728.

The previous prime is 668667487. The next prime is 668667491. The reversal of 668667488 is 884766866.

668667488 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668667481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10447898 + ... + 10447961.

It is an arithmetic number, because the mean of its divisors is an integer number (109703265).

Almost surely, 2^668667488 is an apocalyptic number.

It is an amenable number.

668667488 is a deficient number, since it is larger than the sum of its proper divisors (647771692).

668667488 is a wasteful number, since it uses less digits than its factorization.

668667488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20895869 (or 20895861 counting only the distinct ones).

The product of its digits is 18579456, while the sum is 59.

The square root of 668667488 is about 25858.6056855353. The cubic root of 668667488 is about 874.4535311082.

The spelling of 668667488 in words is "six hundred sixty-eight million, six hundred sixty-seven thousand, four hundred eighty-eight".