669056263 has 2 divisors, whose sum is σ = 669056264. Its totient is φ = 669056262.

The previous prime is 669056243. The next prime is 669056273. The reversal of 669056263 is 362650966.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 669056263 - 2⁵ = 669056231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (669056243) 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, 334528131 + 334528132.

It is an arithmetic number, because the mean of its divisors is an integer number (334528132).

Almost surely, 2^669056263 is an apocalyptic number.

669056263 is a deficient number, since it is larger than the sum of its proper divisors (1).

669056263 is an equidigital number, since it uses as much as digits as its factorization.

669056263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 43.

The square root of 669056263 is about 25866.1219165147. The cubic root of 669056263 is about 874.6229724780.

The spelling of 669056263 in words is "six hundred sixty-nine million, fifty-six thousand, two hundred sixty-three".