19672666559 has 48 divisors (see below), whose sum is σ = 25188120000. Its totient is φ = 15348662784.

The previous prime is 19672666549. The next prime is 19672666583. The reversal of 19672666559 is 95566627691.

It is a de Polignac number, because none of the positive numbers 2^k-19672666559 is a prime.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19672666549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4229267 + ... + 4233915.

It is an arithmetic number, because the mean of its divisors is an integer number (524752500).

Almost surely, 2^19672666559 is an apocalyptic number.

19672666559 is a deficient number, since it is larger than the sum of its proper divisors (5515453441).

19672666559 is an equidigital number, since it uses as much as digits as its factorization.

19672666559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4769 (or 4742 counting only the distinct ones).

The product of its digits is 36741600, while the sum is 62.

The spelling of 19672666559 in words is "nineteen billion, six hundred seventy-two million, six hundred sixty-six thousand, five hundred fifty-nine".