66963319019 has 4 divisors (see below), whose sum is σ = 69874767696. Its totient is φ = 64051870344.

The previous prime is 66963319013. The next prime is 66963319037. The reversal of 66963319019 is 91091336966.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-66963319019 is a prime.

It is a super-2 number, since 2×66963319019² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66963319013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1455724304 + ... + 1455724349.

It is an arithmetic number, because the mean of its divisors is an integer number (17468691924).

Almost surely, 2^66963319019 is an apocalyptic number.

66963319019 is a deficient number, since it is larger than the sum of its proper divisors (2911448677).

66963319019 is a wasteful number, since it uses less digits than its factorization.

66963319019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2911448676.

The product of its (nonzero) digits is 1417176, while the sum is 53.

The spelling of 66963319019 in words is "sixty-six billion, nine hundred sixty-three million, three hundred nineteen thousand, nineteen".