668873323 has 2 divisors, whose sum is σ = 668873324. Its totient is φ = 668873322.

The previous prime is 668873273. The next prime is 668873341. The reversal of 668873323 is 323378866.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 668873323 - 2¹⁷ = 668742251 is a prime.

It is not a weakly prime, because it can be changed into another prime (668873423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334436661 + 334436662.

It is an arithmetic number, because the mean of its divisors is an integer number (334436662).

Almost surely, 2^668873323 is an apocalyptic number.

668873323 is a deficient number, since it is larger than the sum of its proper divisors (1).

668873323 is an equidigital number, since it uses as much as digits as its factorization.

668873323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 46.

The square root of 668873323 is about 25862.5853889359. The cubic root of 668873323 is about 874.5432491818.

The spelling of 668873323 in words is "six hundred sixty-eight million, eight hundred seventy-three thousand, three hundred twenty-three".