669042163 has 2 divisors, whose sum is σ = 669042164. Its totient is φ = 669042162.

The previous prime is 669042137. The next prime is 669042181. The reversal of 669042163 is 361240966.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-669042163 is a prime.

It is a super-3 number, since 3×669042163³ (a number of 27 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (669042113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334521081 + 334521082.

It is an arithmetic number, because the mean of its divisors is an integer number (334521082).

Almost surely, 2^669042163 is an apocalyptic number.

669042163 is a deficient number, since it is larger than the sum of its proper divisors (1).

669042163 is an equidigital number, since it uses as much as digits as its factorization.

669042163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 669042163 is about 25865.8493577922. The cubic root of 669042163 is about 874.6168283657.

The spelling of 669042163 in words is "six hundred sixty-nine million, forty-two thousand, one hundred sixty-three".