19379278066 has 4 divisors (see below), whose sum is σ = 29068917102. Its totient is φ = 9689639032.

The previous prime is 19379278013. The next prime is 19379278073. The reversal of 19379278066 is 66087297391.

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

It can be written as a sum of positive squares in only one way, i.e., 17143974225 + 2235303841 = 130935^2 + 47279^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 19379278066.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4844819515 + ... + 4844819518.

Almost surely, 2^19379278066 is an apocalyptic number.

19379278066 is a deficient number, since it is larger than the sum of its proper divisors (9689639036).

19379278066 is an equidigital number, since it uses as much as digits as its factorization.

19379278066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9689639035.

The product of its (nonzero) digits is 6858432, while the sum is 58.

The spelling of 19379278066 in words is "nineteen billion, three hundred seventy-nine million, two hundred seventy-eight thousand, sixty-six".