6766139 has 4 divisors (see below), whose sum is σ = 6893856. Its totient is φ = 6638424.

The previous prime is 6766127. The next prime is 6766141. The reversal of 6766139 is 9316676.

6766139 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 6766139 - 2²⁰ = 5717563 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6766169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63779 + ... + 63884.

It is an arithmetic number, because the mean of its divisors is an integer number (1723464).

Almost surely, 2^6766139 is an apocalyptic number.

6766139 is a deficient number, since it is larger than the sum of its proper divisors (127717).

6766139 is a wasteful number, since it uses less digits than its factorization.

6766139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127716.

The product of its digits is 40824, while the sum is 38.

The square root of 6766139 is about 2601.1803090136. The cubic root of 6766139 is about 189.1386588285.

The spelling of 6766139 in words is "six million, seven hundred sixty-six thousand, one hundred thirty-nine".