668227694 has 8 divisors (see below), whose sum is σ = 1045921680. Its totient is φ = 319587136.

The previous prime is 668227691. The next prime is 668227711. The reversal of 668227694 is 496722866.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668227691) 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, 7263299 + ... + 7263390.

It is an arithmetic number, because the mean of its divisors is an integer number (130740210).

Almost surely, 2^668227694 is an apocalyptic number.

668227694 is a deficient number, since it is larger than the sum of its proper divisors (377693986).

668227694 is a wasteful number, since it uses less digits than its factorization.

668227694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14526714.

The product of its digits is 1741824, while the sum is 50.

The square root of 668227694 is about 25850.1004640214. The cubic root of 668227694 is about 874.2617747326.

The spelling of 668227694 in words is "six hundred sixty-eight million, two hundred twenty-seven thousand, six hundred ninety-four".