6601139 has 4 divisors (see below), whose sum is σ = 6611040. Its totient is φ = 6591240.

The previous prime is 6601129. The next prime is 6601157. The reversal of 6601139 is 9311066.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9311066 = 2 ⋅4655533.

It is a cyclic number.

It is not a de Polignac number, because 6601139 - 2¹⁶ = 6535603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6601129) 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 3 ways as a sum of consecutive naturals, for example, 3872 + ... + 5309.

It is an arithmetic number, because the mean of its divisors is an integer number (1652760).

Almost surely, 2^6601139 is an apocalyptic number.

6601139 is a deficient number, since it is larger than the sum of its proper divisors (9901).

6601139 is an equidigital number, since it uses as much as digits as its factorization.

6601139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9900.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 6601139 is about 2569.2681837442. The cubic root of 6601139 is about 187.5885353732.

The spelling of 6601139 in words is "six million, six hundred one thousand, one hundred thirty-nine".