669846823 has 2 divisors, whose sum is σ = 669846824. Its totient is φ = 669846822.

The previous prime is 669846817. The next prime is 669846829. The reversal of 669846823 is 328648966.

It is a balanced prime because it is at equal distance from previous prime (669846817) and next prime (669846829).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-669846823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (669846829) 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, 334923411 + 334923412.

It is an arithmetic number, because the mean of its divisors is an integer number (334923412).

Almost surely, 2^669846823 is an apocalyptic number.

669846823 is a deficient number, since it is larger than the sum of its proper divisors (1).

669846823 is an equidigital number, since it uses as much as digits as its factorization.

669846823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2985984, while the sum is 52.

The square root of 669846823 is about 25881.3991700603. The cubic root of 669846823 is about 874.9673230790.

The spelling of 669846823 in words is "six hundred sixty-nine million, eight hundred forty-six thousand, eight hundred twenty-three".