9876666789 has 12 divisors (see below), whose sum is σ = 15563232672. Its totient is φ = 5985858600.

The previous prime is 9876666757. The next prime is 9876666791.

9876666789 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 9876666789 - 2⁵ = 9876666757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9876666719) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49882057 + ... + 49882254.

It is an arithmetic number, because the mean of its divisors is an integer number (1296936056).

Almost surely, 2^9876666789 is an apocalyptic number.

9876666789 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

It is an amenable number.

9876666789 is a deficient number, since it is larger than the sum of its proper divisors (5686565883).

9876666789 is a wasteful number, since it uses less digits than its factorization.

9876666789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99764328 (or 99764325 counting only the distinct ones).

The product of its digits is 329204736, while the sum is 72.

The square root of 9876666789 is about 99381.4207435172. The cubic root of 9876666789 is about 2145.5409143279.

The spelling of 9876666789 in words is "nine billion, eight hundred seventy-six million, six hundred sixty-six thousand, seven hundred eighty-nine".