9788066819 has 4 divisors (see below), whose sum is σ = 9788958240. Its totient is φ = 9787175400.

The previous prime is 9788066807. The next prime is 9788066851. The reversal of 9788066819 is 9186608879.

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

It is a cyclic number.

It is not a de Polignac number, because 9788066819 - 2⁴ = 9788066803 is a prime.

It is a super-2 number, since 2×9788066819² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9788066879) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 429032 + ... + 451269.

It is an arithmetic number, because the mean of its divisors is an integer number (2447239560).

Almost surely, 2^9788066819 is an apocalyptic number.

9788066819 is a deficient number, since it is larger than the sum of its proper divisors (891421).

9788066819 is a wasteful number, since it uses less digits than its factorization.

9788066819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891420.

The product of its (nonzero) digits is 10450944, while the sum is 62.

The square root of 9788066819 is about 98934.6593414057. The cubic root of 9788066819 is about 2139.1060128080.

The spelling of 9788066819 in words is "nine billion, seven hundred eighty-eight million, sixty-six thousand, eight hundred nineteen".