669828899 has 2 divisors, whose sum is σ = 669828900. Its totient is φ = 669828898.

The previous prime is 669828889. The next prime is 669828923. The reversal of 669828899 is 998828966.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-669828899 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (669828889) 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, 334914449 + 334914450.

It is an arithmetic number, because the mean of its divisors is an integer number (334914450).

Almost surely, 2^669828899 is an apocalyptic number.

669828899 is a deficient number, since it is larger than the sum of its proper divisors (1).

669828899 is an equidigital number, since it uses as much as digits as its factorization.

669828899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26873856, while the sum is 65.

The square root of 669828899 is about 25881.0528958928. The cubic root of 669828899 is about 874.9595187803.

The spelling of 669828899 in words is "six hundred sixty-nine million, eight hundred twenty-eight thousand, eight hundred ninety-nine".