668045 has 8 divisors (see below), whose sum is σ = 916224. Its totient is φ = 458064.

The previous prime is 668033. The next prime is 668047. The reversal of 668045 is 540866.

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 668045 - 2⁴ = 668029 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 667999 and 668017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668047) 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, 9509 + ... + 9578.

It is an arithmetic number, because the mean of its divisors is an integer number (114528).

2⁶⁶⁸⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

668045 is a deficient number, since it is larger than the sum of its proper divisors (248179).

668045 is a wasteful number, since it uses less digits than its factorization.

668045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19099.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 668045 is about 817.3401984486. The cubic root of 668045 is about 87.4182092842.

The spelling of 668045 in words is "six hundred sixty-eight thousand, forty-five".