6630139 has 4 divisors (see below), whose sum is σ = 6637720. Its totient is φ = 6622560.

The previous prime is 6630137. The next prime is 6630157. The reversal of 6630139 is 9310366.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6630139 - 2¹ = 6630137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6630131) 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, 2277 + ... + 4294.

It is an arithmetic number, because the mean of its divisors is an integer number (1659430).

Almost surely, 2^6630139 is an apocalyptic number.

6630139 is a deficient number, since it is larger than the sum of its proper divisors (7581).

6630139 is a wasteful number, since it uses less digits than its factorization.

6630139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7580.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 6630139 is about 2574.9056293387. The cubic root of 6630139 is about 187.8628375561.

The spelling of 6630139 in words is "six million, six hundred thirty thousand, one hundred thirty-nine".