668771416 has 8 divisors (see below), whose sum is σ = 1253946420. Its totient is φ = 334385704.

The previous prime is 668771333. The next prime is 668771423. The reversal of 668771416 is 614177866.

668771416 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41798206 + ... + 41798221.

Almost surely, 2^668771416 is an apocalyptic number.

It is an amenable number.

668771416 is a deficient number, since it is larger than the sum of its proper divisors (585175004).

668771416 is a wasteful number, since it uses less digits than its factorization.

668771416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83596433 (or 83596429 counting only the distinct ones).

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

The square root of 668771416 is about 25860.6151512295. The cubic root of 668771416 is about 874.4988328963.

The spelling of 668771416 in words is "six hundred sixty-eight million, seven hundred seventy-one thousand, four hundred sixteen".