669140999 has 2 divisors, whose sum is σ = 669141000. Its totient is φ = 669140998.

The previous prime is 669140963. The next prime is 669141019. The reversal of 669140999 is 999041966.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-669140999 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 669140999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (669140929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334570499 + 334570500.

It is an arithmetic number, because the mean of its divisors is an integer number (334570500).

Almost surely, 2^669140999 is an apocalyptic number.

669140999 is a deficient number, since it is larger than the sum of its proper divisors (1).

669140999 is an equidigital number, since it uses as much as digits as its factorization.

669140999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 944784, while the sum is 53.

The square root of 669140999 is about 25867.7598372955. The cubic root of 669140999 is about 874.6598945964.

The spelling of 669140999 in words is "six hundred sixty-nine million, one hundred forty thousand, nine hundred ninety-nine".