6655139 has 4 divisors (see below), whose sum is σ = 6719856. Its totient is φ = 6590424.

The previous prime is 6655133. The next prime is 6655169. The reversal of 6655139 is 9315566.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6655139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6655099 and 6655108.

It is not an unprimeable number, because it can be changed into a prime (6655133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32204 + ... + 32409.

It is an arithmetic number, because the mean of its divisors is an integer number (1679964).

Almost surely, 2^6655139 is an apocalyptic number.

6655139 is a deficient number, since it is larger than the sum of its proper divisors (64717).

6655139 is a wasteful number, since it uses less digits than its factorization.

6655139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64716.

The product of its digits is 24300, while the sum is 35.

The square root of 6655139 is about 2579.7556085800. The cubic root of 6655139 is about 188.0986636937.

The spelling of 6655139 in words is "six million, six hundred fifty-five thousand, one hundred thirty-nine".