669192899 has 2 divisors, whose sum is σ = 669192900. Its totient is φ = 669192898.

The previous prime is 669192871. The next prime is 669192907. The reversal of 669192899 is 998291966.

669192899 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 669192899 - 2¹⁶ = 669127363 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (669192499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334596449 + 334596450.

It is an arithmetic number, because the mean of its divisors is an integer number (334596450).

Almost surely, 2^669192899 is an apocalyptic number.

669192899 is a deficient number, since it is larger than the sum of its proper divisors (1).

669192899 is an equidigital number, since it uses as much as digits as its factorization.

669192899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3779136, while the sum is 59.

The square root of 669192899 is about 25868.7629970975. The cubic root of 669192899 is about 874.6825075061.

The spelling of 669192899 in words is "six hundred sixty-nine million, one hundred ninety-two thousand, eight hundred ninety-nine".