667823353 has 2 divisors, whose sum is σ = 667823354. Its totient is φ = 667823352.

The previous prime is 667823347. The next prime is 667823357. The reversal of 667823353 is 353328766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 552626064 + 115197289 = 23508^2 + 10733^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667823353 is a prime.

It is not a weakly prime, because it can be changed into another prime (667823357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333911676 + 333911677.

It is an arithmetic number, because the mean of its divisors is an integer number (333911677).

Almost surely, 2^667823353 is an apocalyptic number.

It is an amenable number.

667823353 is a deficient number, since it is larger than the sum of its proper divisors (1).

667823353 is an equidigital number, since it uses as much as digits as its factorization.

667823353 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 43.

The square root of 667823353 is about 25842.2784018747. The cubic root of 667823353 is about 874.0854021140.

The spelling of 667823353 in words is "six hundred sixty-seven million, eight hundred twenty-three thousand, three hundred fifty-three".