9788066821 has 8 divisors (see below), whose sum is σ = 10881027584. Its totient is φ = 8743682160.

The previous prime is 9788066807. The next prime is 9788066851. The reversal of 9788066821 is 1286608879.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9788066821 is a prime.

It is a super-2 number, since 2×9788066821² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9788066851) 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 7 ways as a sum of consecutive naturals, for example, 12143601 + ... + 12144406.

It is an arithmetic number, because the mean of its divisors is an integer number (1360128448).

Almost surely, 2^9788066821 is an apocalyptic number.

It is an amenable number.

9788066821 is a deficient number, since it is larger than the sum of its proper divisors (1092960763).

9788066821 is a wasteful number, since it uses less digits than its factorization.

9788066821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24288051.

The product of its (nonzero) digits is 2322432, while the sum is 55.

The square root of 9788066821 is about 98934.6593515134. The cubic root of 9788066821 is about 2139.1060129537.

The spelling of 9788066821 in words is "nine billion, seven hundred eighty-eight million, sixty-six thousand, eight hundred twenty-one".