668416771 has 8 divisors (see below), whose sum is σ = 730047024. Its totient is φ = 606930720.

The previous prime is 668416769. The next prime is 668416783. The reversal of 668416771 is 177614866.

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

It is not a de Polignac number, because 668416771 - 2¹ = 668416769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668416741) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 26236 + ... + 45001.

It is an arithmetic number, because the mean of its divisors is an integer number (91255878).

Almost surely, 2^668416771 is an apocalyptic number.

668416771 is a deficient number, since it is larger than the sum of its proper divisors (61630253).

668416771 is a wasteful number, since it uses less digits than its factorization.

668416771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72101.

The product of its digits is 338688, while the sum is 46.

The square root of 668416771 is about 25853.7573864999. The cubic root of 668416771 is about 874.3442252738.

The spelling of 668416771 in words is "six hundred sixty-eight million, four hundred sixteen thousand, seven hundred seventy-one".