669469444687 has 2 divisors, whose sum is σ = 669469444688. Its totient is φ = 669469444686.

The previous prime is 669469444661. The next prime is 669469444697. The reversal of 669469444687 is 786444964966.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 669469444687 - 2¹⁹ = 669468920399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (669469444697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334734722343 + 334734722344.

It is an arithmetic number, because the mean of its divisors is an integer number (334734722344).

Almost surely, 2^669469444687 is an apocalyptic number.

669469444687 is a deficient number, since it is larger than the sum of its proper divisors (1).

669469444687 is an equidigital number, since it uses as much as digits as its factorization.

669469444687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1504935936, while the sum is 73.

The spelling of 669469444687 in words is "six hundred sixty-nine billion, four hundred sixty-nine million, four hundred forty-four thousand, six hundred eighty-seven".