668289223 has 8 divisors (see below), whose sum is σ = 803957120. Its totient is φ = 542670840.

The previous prime is 668289197. The next prime is 668289229. The reversal of 668289223 is 322982866.

It is a happy number.

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 668289223 - 2⁹ = 668288711 is a prime.

It is a super-2 number, since 2×668289223² = 893220971155887458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668289229) 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, 2512233 + ... + 2512498.

It is an arithmetic number, because the mean of its divisors is an integer number (100494640).

Almost surely, 2^668289223 is an apocalyptic number.

668289223 is a deficient number, since it is larger than the sum of its proper divisors (135667897).

668289223 is a wasteful number, since it uses less digits than its factorization.

668289223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5024757.

The product of its digits is 497664, while the sum is 46.

The square root of 668289223 is about 25851.2905480558. The cubic root of 668289223 is about 874.2886073039.

The spelling of 668289223 in words is "six hundred sixty-eight million, two hundred eighty-nine thousand, two hundred twenty-three".