9139066785 has 80 divisors (see below), whose sum is σ = 17711496000. Its totient is φ = 4492692864.

The previous prime is 9139066691. The next prime is 9139066789. The reversal of 9139066785 is 5876609319.

It is not a de Polignac number, because 9139066785 - 2²⁰ = 9138018209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9139066789) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 268666 + ... + 300764.

It is an arithmetic number, because the mean of its divisors is an integer number (221393700).

Almost surely, 2^9139066785 is an apocalyptic number.

9139066785 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

9139066785 is a deficient number, since it is larger than the sum of its proper divisors (8572429215).

9139066785 is a wasteful number, since it uses less digits than its factorization.

9139066785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32172 (or 32163 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 54.

The square root of 9139066785 is about 95598.4664364445. The cubic root of 9139066785 is about 2090.7428343968.

The spelling of 9139066785 in words is "nine billion, one hundred thirty-nine million, sixty-six thousand, seven hundred eighty-five".