6725639 has 8 divisors (see below), whose sum is σ = 7104000. Its totient is φ = 6349752.

The previous prime is 6725633. The next prime is 6725657. The reversal of 6725639 is 9365276.

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 6725639 - 2¹⁶ = 6660103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6725633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8732 + ... + 9470.

It is an arithmetic number, because the mean of its divisors is an integer number (888000).

Almost surely, 2^6725639 is an apocalyptic number.

6725639 is a deficient number, since it is larger than the sum of its proper divisors (378361).

6725639 is a wasteful number, since it uses less digits than its factorization.

6725639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237.

The product of its digits is 68040, while the sum is 38.

The square root of 6725639 is about 2593.3836970260. The cubic root of 6725639 is about 188.7605283369.

The spelling of 6725639 in words is "six million, seven hundred twenty-five thousand, six hundred thirty-nine".