668354709 has 8 divisors (see below), whose sum is σ = 972152352. Its totient is φ = 405063440.

The previous prime is 668354707. The next prime is 668354747. The reversal of 668354709 is 907453866.

668354709 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 a cyclic number.

It is not a de Polignac number, because 668354709 - 2¹ = 668354707 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668354707) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10126554 + ... + 10126619.

It is an arithmetic number, because the mean of its divisors is an integer number (121519044).

Almost surely, 2^668354709 is an apocalyptic number.

It is an amenable number.

668354709 is a deficient number, since it is larger than the sum of its proper divisors (303797643).

668354709 is a wasteful number, since it uses less digits than its factorization.

668354709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20253187.

The product of its (nonzero) digits is 1088640, while the sum is 48.

The square root of 668354709 is about 25852.5571075667. The cubic root of 668354709 is about 874.3171636992.

The spelling of 668354709 in words is "six hundred sixty-eight million, three hundred fifty-four thousand, seven hundred nine".