669604471747 has 2 divisors, whose sum is σ = 669604471748. Its totient is φ = 669604471746.

The previous prime is 669604471741. The next prime is 669604471841. The reversal of 669604471747 is 747174406966.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 669604471747 - 2¹⁹ = 669603947459 is a prime.

It is not a weakly prime, because it can be changed into another prime (669604471741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334802235873 + 334802235874.

It is an arithmetic number, because the mean of its divisors is an integer number (334802235874).

Almost surely, 2^669604471747 is an apocalyptic number.

669604471747 is a deficient number, since it is larger than the sum of its proper divisors (1).

669604471747 is an equidigital number, since it uses as much as digits as its factorization.

669604471747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42674688, while the sum is 61.

The spelling of 669604471747 in words is "six hundred sixty-nine billion, six hundred four million, four hundred seventy-one thousand, seven hundred forty-seven".