6667139 has 8 divisors (see below), whose sum is σ = 6912000. Its totient is φ = 6424200.

The previous prime is 6667127. The next prime is 6667147. The reversal of 6667139 is 9317666.

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

It is a cyclic number.

It is not a de Polignac number, because 6667139 - 2⁸ = 6666883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6667159) 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, 13112 + ... + 13610.

It is an arithmetic number, because the mean of its divisors is an integer number (864000).

Almost surely, 2^6667139 is an apocalyptic number.

6667139 is a deficient number, since it is larger than the sum of its proper divisors (244861).

6667139 is a wasteful number, since it uses less digits than its factorization.

6667139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961.

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

The square root of 6667139 is about 2582.0803628083. The cubic root of 6667139 is about 188.2116504981.

It can be divided in two parts, 666 and 7139, that multiplied together give a palindrome (4754574).

The spelling of 6667139 in words is "six million, six hundred sixty-seven thousand, one hundred thirty-nine".