668803 has 2 divisors, whose sum is σ = 668804. Its totient is φ = 668802.

The previous prime is 668791. The next prime is 668813. The reversal of 668803 is 308866.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-668803 is a prime.

It is not a weakly prime, because it can be changed into another prime (668813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334401 + 334402.

It is an arithmetic number, because the mean of its divisors is an integer number (334402).

2⁶⁶⁸⁸⁰³ is an apocalyptic number.

668803 is a deficient number, since it is larger than the sum of its proper divisors (1).

668803 is an equidigital number, since it uses as much as digits as its factorization.

668803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 668803 is about 817.8037661933. The cubic root of 668803 is about 87.4512599302.

The spelling of 668803 in words is "six hundred sixty-eight thousand, eight hundred three".