668116716 has 12 divisors (see below), whose sum is σ = 1558939032. Its totient is φ = 222705568.

The previous prime is 668116693. The next prime is 668116727. The reversal of 668116716 is 617611866.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27838185 + ... + 27838208.

It is an arithmetic number, because the mean of its divisors is an integer number (129911586).

Almost surely, 2^668116716 is an apocalyptic number.

It is an amenable number.

668116716 is an abundant number, since it is smaller than the sum of its proper divisors (890822316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

668116716 is a wasteful number, since it uses less digits than its factorization.

668116716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55676400 (or 55676398 counting only the distinct ones).

The product of its digits is 72576, while the sum is 42.

The square root of 668116716 is about 25847.9538068297. The cubic root of 668116716 is about 874.2133734687.

The spelling of 668116716 in words is "six hundred sixty-eight million, one hundred sixteen thousand, seven hundred sixteen".