669869329579 has 2 divisors, whose sum is σ = 669869329580. Its totient is φ = 669869329578.

The previous prime is 669869329537. The next prime is 669869329631. The reversal of 669869329579 is 975923968966.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 669869329579 - 2¹⁷ = 669869198507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 669869329499 and 669869329508.

It is not a weakly prime, because it can be changed into another prime (669869329979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334934664789 + 334934664790.

It is an arithmetic number, because the mean of its divisors is an integer number (334934664790).

Almost surely, 2^669869329579 is an apocalyptic number.

669869329579 is a deficient number, since it is larger than the sum of its proper divisors (1).

669869329579 is an equidigital number, since it uses as much as digits as its factorization.

669869329579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2380855680, while the sum is 79.

The spelling of 669869329579 in words is "six hundred sixty-nine billion, eight hundred sixty-nine million, three hundred twenty-nine thousand, five hundred seventy-nine".