668784130 has 16 divisors (see below), whose sum is σ = 1375784640. Its totient is φ = 229297392.

The previous prime is 668784107. The next prime is 668784187. The reversal of 668784130 is 31487866.

668784130 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4776960 + ... + 4777099.

It is an arithmetic number, because the mean of its divisors is an integer number (85986540).

Almost surely, 2^668784130 is an apocalyptic number.

668784130 is an abundant number, since it is smaller than the sum of its proper divisors (707000510).

668784130 is a wasteful number, since it uses less digits than its factorization.

668784130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9554073.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 668784130 is about 25860.8609678796. The cubic root of 668784130 is about 874.5043745544.

The spelling of 668784130 in words is "six hundred sixty-eight million, seven hundred eighty-four thousand, one hundred thirty".