668740888 has 8 divisors (see below), whose sum is σ = 1253889180. Its totient is φ = 334370440.

The previous prime is 668740871. The next prime is 668740889. The reversal of 668740888 is 888047866.

668740888 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 (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668740889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41796298 + ... + 41796313.

Almost surely, 2^668740888 is an apocalyptic number.

It is an amenable number.

668740888 is a deficient number, since it is larger than the sum of its proper divisors (585148292).

668740888 is a wasteful number, since it uses less digits than its factorization.

668740888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83592617 (or 83592613 counting only the distinct ones).

The product of its (nonzero) digits is 4128768, while the sum is 55.

The square root of 668740888 is about 25860.0249033136. The cubic root of 668740888 is about 874.4855263534.

The spelling of 668740888 in words is "six hundred sixty-eight million, seven hundred forty thousand, eight hundred eighty-eight".