668315786 has 8 divisors (see below), whose sum is σ = 1002655584. Its totient is φ = 334097260.

The previous prime is 668315777. The next prime is 668315789. The reversal of 668315786 is 687513866.

It is a happy number.

668315786 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (668315789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14990 + ... + 39513.

It is an arithmetic number, because the mean of its divisors is an integer number (125331948).

Almost surely, 2^668315786 is an apocalyptic number.

668315786 is a deficient number, since it is larger than the sum of its proper divisors (334339798).

668315786 is a wasteful number, since it uses less digits than its factorization.

668315786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60636.

The product of its digits is 1451520, while the sum is 50.

The square root of 668315786 is about 25851.8043084037. The cubic root of 668315786 is about 874.3001908218.

The spelling of 668315786 in words is "six hundred sixty-eight million, three hundred fifteen thousand, seven hundred eighty-six".